cruise control quit while driving

5 Reasons Why Your Cruise Control Stopped Working

• Updated: March 15, 2023

It would be difficult to find a vehicle on the road today without cruise control. This invaluable feature makes driving long distances easier but can also cause trouble when it malfunctions. Understanding the reasons your cruise control stopped working ensures that you can get the problem fixed quickly for a more enjoyable ride. 

While this fault can cause issues with the cruise control system itself, there could also be an effect on the acceleration of your vehicle. That’s why you want to have it looked at as soon as you notice a problem. Let’s take a quick look at the reasons your cruise control may have stopped working.

Reasons Why Your Cruise Control Stopped Working

The most common reason a cruise control stops working is due to a blown fuse or a defective brake pedal switch . It can also be caused by issues with the throttle control system or the ABS. In older cruise control systems, it can be caused by a broken vacuum line.

Here is a more detailed list of the possible reasons your cruise control is not working:

1. Blown Fuse

All electrical systems in the vehicle are controlled by fuses. Your cruise control system is attached to a fuse that can blow if there is a short circuit or fault. Without a good fuse, the cruise control system can’t work at all.

Thankfully, it’s not difficult to find and replace a blown fuse. Look in the owner’s manual to find the fuse that corresponds with the cruise control technology. 

2. Defective Brake Pedal Switch

The brake pedal switch is responsible for turning the brake lights on and off based on the pedal position. Cruise control systems are designed to disengage whenever your brake pedal gets pressed. 

Because the cruise control is wired into the brake pedal switch, any fault can cause it to stop working. When the brake pedal switch malfunctions, the car believes the brakes are engaged, causing the system to turn off automatically. Not only that, but your car’s brake light might also be stuck on, leaving confused drivers in your wake. 

3. Malfunctioning Speed Sensor

Speed sensors are located on every wheel or differential. The purpose of these sensors is to monitor the speed of the wheels to determine if traction control is needed. 

The speed sensors are also part of the cruise control system. When a sensor fails, the cruise control can stop working and the speedometer might act strange as well. 

If there is an issue with a speed sensor, it will often show with an ABS warning light or a check engine light on the dashboard.

RELATED: 3 Symptoms of a Bad ABS Wheel Speed Sensor

4. Electrical Issues

The cruise control system is electronic, with many components working together to make the system operate. If the cruise control fails to work, you want to check the wiring harness and associated connectors for a fault.

You also need to ensure that the voltage source is supplying enough power to the system. Even the smallest fault can cause defects with the cruise control. In many cases, there can be an issue with the cruise control lever or buttons causing the cruise control to not engage.

If your cruise control buttons are located on the steering wheel it could also be caused by a bad clock spring, which is located behind the steering wheel.

Check the system with an OBD2 scanner to look for any trouble codes related to the cruise control.

RELATED: 5 Symptoms of a Broken Clock Spring, Location & Replacement Cost

5. Damaged Vacuum Actuator, Hoses or Cable (Older cruise control)

If you drive an older vehicle with cruise control, you might have an issue with the vacuum actuator or the cable that connects to the throttle. If there has been damage done to the vacuum hoses or the actuator, the cruise control will stop working altogether.

Additionally, the cable linking the actuator to the throttle must be in good shape. If it has been broken, the cruise control will fail. 

What is Cruise Control?

Cruise control is a feature that is used when you are traveling at a consistent speed. Cruise control was first introduced for automobiles in the 1950s. However, it took many years before it became a staple in the modern vehicle.

This electrical system allows you to set a predetermined speed and take your foot off of the gas pedal. If you are on a long drive, there is less fatigue because you don’t have to try to maintain your speed. Cruise control can also benefit fuel economy because the vehicle uses less fuel when traveling steadily. 

In newer cars, you might be able to find adaptive cruise control , which is a smart technology. Adaptive cruise control allows you to travel at a predetermined speed, but it also helps to maintain a safe distance from the vehicles in front of you with the help of sensors. With conventional cruise control, you need to take over when the car in front of you slows down, but that’s not the case with adaptive cruise control. 

There are also vehicles nowadays with not only cruise control, but fully self-driving vehicles . We will most likely see much more of this in the future.

Cruise Control Repair Cost

The cost to repair your cruise control system depends on what caused it to fail. If you need to replace a cruise control or brake switch, you might spend between $125 and $350, including parts and labor. However, the cost to change a fuse is only a few dollars and you can perform the replacement yourself in just a matter of seconds. 

On the other hand, when something major fails, such as the actuator, you could be looking at a much higher repair bill. In some vehicles, the cost to replace a cruise control actuator can cost more than $700. These costs rise if you drive a luxury vehicle or one that is difficult to get parts for. 

It might not seem immediately important for you to fix the broken cruise control, but this defective system can affect other performance aspects. You could start to notice issues with acceleration or have trouble with the speedometer. To play it safe, it’s always best to have the cruise control repaired as soon as you notice a problem.

Is there a fuse for the cruise control?

Yes. If the cruise control is installed from the factory, you should check your car’s owner’s manual for the fuse location. If it’s an aftermarket cruise control, you’ll need to follow the wires to find the fuse.

Does the brake switch affect the cruise control system?

Yes. The brake switch affects the cruise control system. The brake switch sends a signal to the cruise control system to let it know when the brakes are being applied for the engine to know when it should stop accelerating.

Will the cruise control work if the check engine light is on?

The cruise control function will be disabled when the check engine light is on in most car models, even if the cause of the check engine light is not the cruise control itself. This is mainly due to safety reasons.

Can a vacuum leak affect cruise control?

Older vehicles use vacuum to control the throttle for the cruise control, and in this case a vacuum leak can heavily affect the cruise control. However, modern cruise controls are fully electric and in most cases will not be affected by a vacuum leak if the check engine light is not illuminated.

Although many people may think that the cruise control system is unimportant and not worth spending money to repair, the problem can be caused by a faulty part that will affect the engine’s performance or durability. Therefore, it is best not to ignore the problem if your cruise control is not working without first diagnosing the car properly.

If your cruise control still isn’t working after trying all the tips in this article, it’s probably time to take it in for a professional opinion from a mechanic. It may be a more serious problem that requires replacement parts or repairs. In the meantime, drive safe and enjoy the open road!

Learn more:

• Brake Lights Not Working But Tail Lights Are? (How to Fix)
• Tail Lights Not Working But Brake Lights Are? (How to Fix)
• Brake Lights Stay On? (5 Causes & How to Fix it)

Categories: Electric , Troubleshooting

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Cruise Control not Working (Diagnosis and Troubleshooting)

What makes cruise control not work.

Bad brake pedal/light switch — This means communication between you, cruise control and the car is interrupted, and you can’t have immediate manual control of the car.

Bad fuse — Fuses blow to protect the electrical system. Cruise control fuses will do the same, to protect the system and circuits in your car the fuse will break and then need repairing.

Failing speed sensor — Speed sensors are important in cruise control because your car needs to remain at the same speed consistently. Broken speed sensors will affect more than cruise control and need to be serviced urgently

Bad actuator vacuum, hose, or cable –The actuator vacuum is what connects and activates the throttle control. The fault may be with the hoses in the vacuum actuator or the cable linking the system together.

Symptoms of bad cruise control switch

• Symptom 1 — brake pedal does not disengage cruise control

There’s a switch fixed to the bases of the brake pedal and if cruise control does not deactivate when braking then it’s a sign that this switch is faulty.

• Symptom 2 — Hissing noises are heard from under the dash.

The cruise control switch is a vacuum system and for some vehicles, it is mounted near the brake pedals under the dash. If you can hear hissing, it could indicate that the switch or one of the switch’s vacuum hoses is broken.

• Symptom 3 — The cruise control switch/button itself does not work

When trying to turn on the function or while cruising it turns off, this is an indicator of a faulty switch and can be related to wiring issues or the above (1-2) symptoms

• Symptom 4 — A blown fuse

A blown fuse could be a simple error and fix. The switch circuit or fuse may just need to be replaced for the problem to resolve.

Possible Cruise control failure Scenarios

1. Cruise control not working after battery change

• Possible cause — This differs from vehicle to vehicle and among brands. Some drivers’ cruise control malfunctions after jump-starting their battery, and this is because the battery is still discharged. Newer cars have many electronic systems, and most are powered by the battery. So, if the battery is discharged or low-powered, the electrical cruise control system can be affected.
• Solution — Putting your battery on a trickle charger (2-5 amp) for 12 hours or driving on cruise for a couple of hours may resolve this issue.

2. Cruise control turns off while driving

• Possible cause — Damaged speed sensor or actuator, these two could be internally malfunctioning and causing the cruise control to disengage without input from you.
• Solution — Have a technician or mechanic run a diagnostic with the speed sensor and check the actuator hoses and cables.

3. Cruise control works intermittently

• Possible cause — this may relate to the brake pedal switch. If cruise control is intermittently disengaging, it could be a wiring issue with the switch.
• Solution — Have the brake pedal to cruise control switch investigated by a mechanic or technician and determine if there is a faulty wire to blame. You may need to have the switch or some of its parts replaced.

4. Cruise control turns on but will not set

• Possible cause — The brake pedal switch may be the issue. The brake pedal deactivates cruise control and if it is stuck in the open position, it may cause the cruise control to not engage or set properly.
• Solution — Ask your mechanic or technician to check for this issue specifically in their diagnostic and service.

5. Cruise control turns on by itself

• Possible cause — There may be a failure with the Electronic Control Module (ECM) which manages the actuators or Electronic Control Unit (ECU) which controls the speed in your cruise control
• Solution — You could attempt to reprogram the ECU and ECM if you have the computer tools, otherwise take it into a trusted mechanic or technician.

There are many helpful forums run by mechanics and amateurs:  These are always great for solving those specific problems you might experience.

When CC does not set: https://mechanics.stackexchange.com/questions/34795/cruise-control-will-not-turn-on-cannot-be-enabled-nor-set

When CC is faulty after battery change: https://www.vwvortex.com/threads/help-cruise-control-not-working-after-dead-battery.4464553/

For cruise control and other general repairs, watch this channel: https://www.youtube.com/channel/UCf2f4MeZzSksVMe1z3Lp3hw

Can cruise control cause check engine light?

When the check engine light or MIL (Malfunction Indicator Light) is on, the cruise control light may blink to signal that cruise control has been disabled. This is a safety control as the vehicle is programmed to not go on ‘autopilot’ should the engine or mechanical issue relate to the cruise control systems. If the error or fault is with the cruise control systems, then the MIL may be lit for that as well.

How much does it cost to fix cruise control malfunctions?

• For switch repair (parts and labour) it’s estimated at $125- $350
• For fuse repairs, it could be up to $10 to buy the fuse and replace it yourself in a few minutes — there are many helpful YouTube tutorials on simple car repairs like this one.
• For actuator repairs, some cost more than $700
• Therefore, it’s important to know WHAT the issue is to get an idea of HOW MUCH it will cost you.

Does cruise control malfunction trigger the check engine light?

The function of a check engine light or MIL (Malfunction Indicator Light) is to communicate engine or mechanical failures in your vehicle to prevent an accident on the road. The MIL can be lit for simple reasons like the gas cap is loose. Should your CC system fail or run incorrectly, the MIL could light up. Often when there are other failures or engine faults, the MIL will light and the cruise control with a flicker to signal it has been disabled for safety reasons. Once the cruise control or other issues are fixed, all the lights should go back to being turned off.

Author: Dave Johnston

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• Why is my Cruise Control not Working? [14 reasons]

14 Reasons Why your Cruise Control may NOT Be Working

The reason for your cruise control not working could be as simple as a blown fuse to really complex electrical problems. Defective switches, sensors, and even “check engine” light, all could contribute to this problem.

If you like to travel and own a car fitted with cruise control, you know how comfortable it can be to maintain a constant speed! When a cruise control system gets damaged, it is just as annoying as it is dangerous.

Cruise control is connected to several components of the car, and when it fails it can mean that something could be wrong with the CC itself. It could also be a signal that something wrong is happening with any other component of the car.

Why is my cruise control not working?

In this article, I am going to show you the main reasons why your cruise control may not be working (from the simplest to the more complex ones):

Reason #1. Bad or blown fuse

The cruise control’s circuit (like many other electronic components of your car), is protected by a fuse that will blow to protect the system from short circuits and overloads. If your vehicle’s cruise control fuse is blown, the system will stop working.

You can replace the fuse with a new one of the correct amperage, according to your vehicle’s owner manual. If the new fuse doesn’t blow again, everything will be ok; if the fuse blows again, you have to keep searching for what is making that fuse blow.

Reason #2. Burnt brake lamp

Some cruise control systems are disabled when the brake lamp is blown. Check your brake lights. If you find a burnt brake light, just replace it and test the system again.

Reason #3. Defective brake light switch

A defective pedal switch can also make your cruise control stop working. Remember that all cruise control systems are automatically disengaged as soon as the brake pedal is pressed down.

If the cruise control didn’t stop working when a fault in the brake light or brake pedal switch is detected, it could be dangerous; that’s why the CC control unit constantly monitors the status of this switch.

Reason #4. Clutch pedal switch deactivation (for manual transmission vehicles)

Cruise control is deactivated when the clutch is pressed by the driver in manual transmission cars. The CC control unit monitors this switch as it does the brake light switch.

Reason #5. The vehicle speed sensor is not working

A vehicle’s cruise control needs to be able to determine the vehicle’s actual speed. This enables the system to determine how much throttle needs to be applied in order to keep a certain speed, among other things.

The speedometer speed sensor is not always the sensor used by cruise control. Some systems rely on the ABS speed sensors, others do an average and some have a dedicated speed sensor.

If the system can’t detect the vehicle’s speed or detects a problem with the speed sensor, it will stop working.

Reason #6. Faulty throttle body or accelerator pedal

In modern engines, the throttle body is driven electronically by the engine control unit (ECU), and the accelerator pedal works like a potentiometer. The processor managing the cruise control system will act as the accelerator pedal, sending more or less voltage to the throttle body to open or close the throttle body’s butterfly valve.

If there is a problem with your vehicle’s throttle body, your cruise control won’t work.

Reason #7. Check Engine light is “ON”

If your vehicle instrument panel has the “Check Engine Light” ON and the fault stored in the ECU’s memory is related to some component vital for the cruise control system, you will not be able to use your cruise control until you have fixed that problem.

Reason #8. Faulty steering wheel’s spiral cable/clock spring

The spiral cable connects all the switches from the steering wheel (in case your steering wheel has switches) to their respective modules. This includes the connection of the driver’s airbag.

These wires (also called clock springs) are prone to get cut. A faulty spiral cable may have an open circuit making it unable to reach the vehicle’s cruise control module (CCM).

Reason #9. Bad Cruise Control Switch

Your vehicle’s cruise control switches have internal contacts that wear out. If that happens, the switches won’t be able to contact the CCM.

Depending on which buttons are faulty, your whole cruise control can stop working or just some functions won’t work.

Reason #10. Electrical problems with different modules and wiring

Modern cruise control systems use electrical and electronic components, and they are connected to other modules and systems of the vehicle. Some of these systems are the ECU, ABS, and/or Stability Control Systems like ESP.

The CCM makes a check of these systems once the key is switched to ON, and if some of these components are not working in optimal conditions, the CCM won’t engage. If none of the above items seem to be the problem, the vehicle needs to be taken to a professional who can perform a full scan of all the components, check that all the voltages, wiring harnesses, and connectors are ok.

The professional is going to detect if there are any connection problems between modules and will be able to find the reason why the cruise control is not working.

Reason #11. Dirty or faulty camera or sensor (only for vehicles fitted with adaptive cruise controls)

Newer vehicles have adaptive cruise control systems. These devices not only keep a fixed speed by the driver; they also can detect other vehicles ahead and behind and are able to keep a safe fixed distance to avoid collisions.

Some of these new systems have laser sensors while others have cameras to calculate the right distance to follow considering the vehicle’s speed and acceleration. Any problem with the sensors will prevent adaptive cruise control from working.

Problems with older cruise control systems

Before electronic injection and electronic throttle bodies, some cars had the cruise control function. In fact, the first cruise controls were introduced in the early 1950s.

These electromechanical cruise controls are pretty simple. They have a vacuum actuator connected to the throttle linkage that opens and closes the throttle to maintain the vehicle’s speed.

In early injection cars, the throttle linkage was replaced by a cable. Some common faults of these old cruise control systems are:

• A faulty vacuum actuator. Vacuum actuators have a diaphragm inside that can break. Any vacuum leak will lead to failure.
• Faulty vacuum control solenoid. It can prevent the actuator from operating normally.
• Broken throttle cable. If the throttle cable or linkage is broken, it needs to be replaced.

I hope you enjoyed my guide to cruise control problems. Even though it doesn’t explain how to fix your cruise control, it gives you an idea of where to start looking if you are going to do it yourself.

Now you will have an idea about how the system works and what are the possible reasons why it’s failing (in case you have to take your vehicle to a shop to be repaired).

Attention! This article is for informational purposes ONLY and is NOT a replacement for professional advice! ALWAYS consult your local specialist for an appropriate solution to your problem. All statements, prices, contact information, recommendations, and reviews contained herein came from sources that we believe to be reliable, but the accuracy or completeness thereof is not guaranteed. Please contact the service provider for complete details and updates.

I always Know and admit that even though I went to school for ABR grad. In 1994 3.36gpa still have go go back to school for upgrades due to vehicle advancement but I still learned alot although I am dealing with an 05 f150 stx which has more recalls then a auto parts store where the employees don’t know a inerta. Switch from an ignition switch ,thanks for the information

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7 Reasons Why Cruise Control is Not Working

Cruise control has been around since the late 1950s. There was a time when you could only find this convenient feature in a few model vehicles. Nowadays, it seems like virtually every model vehicle on the road has a cruise control feature.

Cruise control not engaging seems like a trivial issue, but the inability to activate this convenient feature can certainly dampen any road trip. While cruise control failures “rarely” pose safety risks, determining the root cause is necessary to restore its use. Let’s look at the common causes of cruise control malfunction.

Table of Contents

Cruise Control Problems (Accelerating or Maintaining Speed)

If your cruise control feature malfunctions and stops working altogether, you may not think it’s an immediate concern. You’ll probably figure that you just can’t use cruise control anymore until you get the problem fixed.

However, the problem with your cruise control might be related to an acceleration issue too. In fact, there are components of cruise control which can have an adverse effect on the acceleration if those components are bad. That is why you need to be aware of what causes cruise control issues.

Common Causes of Cruise Control Not Working

There are several possible causes of cruise control not working. Below are the top 6 most common causes. Check each of these areas and see if they’re the cause of your cruise control issue. In many cases, the remedy to the problem is not that complicated or expensive.

1) Cruise Control Switch

The cruise control switch is what you use to set your cruising speed. This information is transmitted to the engine control unit and cruise control module in order to sustain the acceleration speed.

If the contacts inside the cruise control switch were to wear out, then the module and unit might not receive the necessary speed information it needs to keep the acceleration going. In response, the system will deactivate entirely and cancel the current cruise acceleration set.

2) Brake Light Switch

Normally, you press the brake pedal to turn off cruise control. The brake light switch must be detected by the cruise control system for this to happen.

If it cannot detect the switch, then cruise control will disable itself automatically until the brake light switch issue is fixed.

A faulty brake light switch can also cause your brake lights to stay on .

3) Blown Fuse

The electrical components of the cruise control system are protected by fuses. Like inside your house, it is possible to blow a fuse. This will cause the cruise control system to turn off until the fuse is replaced.

4) Check Engine Warning Light

If the check engine warning light comes on, it usually means there is a problem with your transmission or engine. Once the engine control unit detects this problem, it may disable your cruise control system in response as a safety precaution.

Until you fix the engine issue, the cruise control will stay disabled.

5) Vehicle Speed Sensor

Most vehicles have a few vehicle speed sensors to transmit speed information about the vehicle to the engine control unit and the cruise control module. The only way your cruise control module is going to know how fast the vehicle is moving is if the vehicle speed sensors feed this information to it.

If the module cannot detect the speed because of faulty speed sensors, then the cruise control system will automatically deactivate.

See Also: What Is Speed Volume Compensation?

6) Electrical Issues

There are several electrical components connected to the cruise control system. The connectors and wiring harnesses, and ground straps are definitely components that you need to check when the cruise control stops working.

Make sure the source of the voltage is still supplying power to the system as well. If any of these components are loose or damaged, then it would explain why the cruise control isn’t functioning.

7) Loose or Broken Cruise Control Cable

Older vehicles that are equipped with cruise control have two throttle cables – one for the gas pedal and one for the cruise control system.

These cables may stretch over time. If the cruise control cable has stretched or is broken, the cruise control system will not be able to operate the throttle plate properly.

Adaptive Cruise Control Specific Problems

Adaptive cruise control gives an extra layer of convenience while driving, as it adjusts your vehicle’s speed based on the distance to the car in front of you. However, this presents additional causes of cruise control failure.

One issue you might face is obstructed sensors. Both radar and cameras are important components of the adaptive cruise control system. When there’s dirt, debris, or ice covering these sensors, your cruise control can stop functioning. To prevent this, regularly clean your vehicle’s sensors, making sure they’re unobstructed.

Separately, failed cameras can also be a culprit. If the cameras aren’t working correctly, you may see an error warning. It’s best to get this checked by a professional to determine whether the cameras need repair or replacement. Hopefully it’s not as they are an expensive replacement.

Apart from cameras, adaptive cruise control relies heavily on radar technology for proper functioning. A misaligned or malfunctioning radar sensor can cause your system to behave irregularly. Again, consult a qualified technician to diagnose the issue and, if needed, recalibrate or replace the radar system.

Safe Driving Without Cruise Control

When cruise control systems fail, it presents challenges adjusting to speed management without the consistent pacing it provides. But there are a few things you can do.

• Focus on scanning gauges more frequently to stay actively aware of mph.
• Avoid zoning out on long hauls.
• Set phone alerts every few miles to remind checking current travel speed.
• Know highway speed limits well so mentally benchmarking against them continues subconsciously.
• Take frequent breaks stretching legs to re-energize alertness until able to diagnose cruise faults.
• Consider alternative adaptive cruise technologies equipped on newer vehicles if financially viable, providing automated incremental slowing when closing distances on lead cars.
• Remain vigilant of lead car distances and your own speed fluctuations.
• Utilize open lanes with fewer surrounding vehicles if possible, reducing needs for continual minor adjustments.
• Stay alert with renewed attention and defensive awareness absent cruise controls automated convenience until repairs are completed.

Intermittent Fault Identification

When cruise controls experience occasional yet repeating failures, meticulously logging every instance of malfunction helps uncover patterns guiding toward root causes.

Date and time each cutoff or disengagement that happens while activated. Detail any environmental or operational conditions present such as: weather, bumpy vs smooth roads, stop & go traffic versus highway speeds.

Reviewing complete repair histories alongside these event logs indicates if previously replaced components only provided temporary fixes before subsequent re-failure later on. Share documented patterns of when and how interruptions occur with shop technicians to guide their pathway tracing and component testing.

The goal is determining if specific elements like an old switch, wire insulation or solder joint chronically breaks down only under certain temperature, vibration or usage strain thresholds.

Cruise Control Repair Costs

So, your cruise control decided to take a break, and now you’re wondering how much it’ll cost to fix it. Well, repair costs vary depending on the specific issue and your vehicle’s make and model. This section will provide you with an idea of what to expect in terms of expenses.

Let’s look at the common reasons for cruise control problems and their approximate price range for replacement or repair:

• Faulty Cruise Control Switch – $100 – $200. A bit more expensive than a brake light switch.
• Blown Fuse  – $5 – $30. Quick and affordable to replace.
• Faulty Brake Light Switch  – $50 – $150. Can be a bit pricier but still manageable.
• Defective Speed Sensor – $100 – $300. Falls somewhere in the middle of the price spectrum.
• Throttle Control System Issues – $200 – $600. More expensive to diagnose and fix.
• ABS-related Problems  – $200 – $1,000. Can also be quite costly to repair.
• Broken Vacuum Line  – $50 – $150. Applicable to older systems and typically inexpensive to fix.

How Does Cruise Control Work?

If you normally drive long distances, especially on the interstate, then cruise control lets you take your foot off the gas while the car maintains the same speed, giving your leg a rest. This may seem like merely a luxurious feature rather than a necessity, but many people depend on it for safe driving.

There are several different types of cruise control systems, but all implementations share similar basic components. There is a sensor to measure vehicle speed, a throttle position sensor , and some mechanism to control the throttle plate without the use of the gas pedal.

Outputs from the speed and throttle position sensors allow the engine computer to determine how much the throttle plate needs to open or close to maintain speed.

Cruise control systems may also use sensors in the transmission, taking the current gear and engine vacuum into account. Throttle position will be different in each gear at a given speed, especially when driving over hills.

Related: How Does Drive-By-Wire Technology Work?

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13 thoughts on “7 Reasons Why Cruise Control is Not Working”

have a 2006 VW new Beetle my cruise works fine until i go to pass some one ,any idea what would cause it to do this? ?

When you hit the gas pedal to overtake, you might be disengaging cruise control.

i’ve heard that bad fuel can create such issue. As stated above, the Check Engine light will come on as part of the safety features to inform you something is not right. Cruise control picks up on this and shuts down.

The engine light was flashing then it stopped then started again, the cruise control is disabled but did come on a couple of times but went off when the engine needed to accelerate, the engine shakes when I. Accelerate too.

my aftermarket cruise on a 2013 Kio Rio LX wont light up

You’re going to have a hard time with finding help for that without providing the name and model of the aftermarket system. It might be best to take it to someone so they can troubleshoot in person.

My cruise indicator light will turn on but when I try to set the speed the light will shut off and not turn back on until I restart the engine. Any ideas what it might be?

Did you ever figure this one out. I got 99 Durango does this too

Cruise control goes rite into high speed when turned on,what could the problem be?

This helped me a lot. I got more out of your 6 reasons a cruise control may not work, than when I inquired about the same situation and got nothing. Thank You, Janet M.

Thanks for the feedback, Janet!

Helpful. Thank you

Mine is a mercedes benz c180, 2002 model my cruise control have just stopped working . So what are the possible causes

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Car advice put simply.

Cruise control not working — causes and fixes

Troubleshoot and fix non-functioning cruise control in your vehicle..

Cruise control is one of the most useful modern driving features which makes every longer journey easier. It lets you travel at a constant speed and reduces the pressure on your foot caused by frequent gas pedal pressing.

However, in case of the cruise control not working , it’s important to deal with the problem right away. If you turn the system on while it malfunctions, you might not be able to turn it off during the drive. So, you can follow this guide to get all the information about the most common reasons for failing cruise control and get advice on how to fix it.

What’s cruise control and how does it work?

To get a better understanding of possible reasons behind malfunctioning cruise control, it’s time to deal with the basics behind the system. Cruise control is an electronic system that helps you maintain a certain speed level for extended periods without holding your foot on the gas pedal.

While driving regularly, the pressure with which you push the gas pedal is transmitted to the throttle position sensor which controls the throttle valve. If you press the pedal further down, the valve gets open, and more air flows into the engine.

On the other hand, if you apply less pressure, the valve is nearly closed, slightly letting air in. The engine control unit (ECU) uses these measurements to calculate fuel injection and translate the pressure into driving power and speed.

The modern cruise control system controls the throttle position sensor and other sensors and electronically simulates the pressure on the gas pedal. Even some older vehicles have cruise control, but in these cars, cruise control used a cable that physically maintained pressure on the accelerator.

With modern improvements, there’s also the introduction of adaptive cruise control which uses several drive assist systems to maintain your speed. These include lane assist and the possibility to increase and lower the speed by pressing the button.

Modern cruise control also measures the speed of the car in front of you in the lane to maintain a safe distance. If you are a car guy, you probably enjoy having control over the machine yourself. However, cruise control is extremely useful during a long highway ride, since it reduces the fatigue and pain of pressing hte4 accelerator for hours.

Reasons behind cruise control not working

Now that you know how the cruise control system works, it’s time to dig deep into the possible reasons behind its malfunction. First, we come by electrical issues since this is an electrical feature after all. However, there are also other possible reasons, so let’s take a look at a few of the most common ones:

• Problems with the throttle body
• Malfunctioning sensors
• Blown fuse and electrical issues
• Faulty brake pedal switch
• Bad mechanical cruise control cable

All of these reasons can make your cruise control ineffective and the worst thing is if it malfunctions while you are using it. It’s also a bad thing since cruise control saves gas while on long journeys down the highway, so you’ll want to fix the problem based on the listed reasons as soon as possible.

How do throttle body issues affect cruise control?

In case the throttle body valve gets stuck, or the throttle body gets clogged, you’ll have a hard time using your cruise control system. The worst thing that could happen in this case is if the gas pedal gets stuck in position, which also affects your driving regardless of the cruise control.

You can clean your throttle body with specific products to be able to use cruise control again and to ensure proper air intake into your engine. Modern cruise control systems lock the throttle valve in a position to ensure even air intake, so if the valve malfunctions, you won’t be able to use it.

Bad or malfunctioning sensors

As mentioned, cruise control is an electrical system and it uses the readings of multiple sensors to adjust and maintain your driving speed. Out of these sensors, the throttle position sensor and the speed sensor are most relevant for the system’s operation.

We already mentioned how the throttle position sensor affects the control of the throttle valve, and the speed sensor monitors the driving speed. It sends information to the ECU regarding the traction control system by the speed readings. If the sensor fails, you’ll likely experience some strange speedometer action and an anti-lock braking system ( ABS ) warning light on the dashboard .

So, the cruise control system might also fail, as it uses the readings of these sensors as well as the data of the ECU regarding traction control and ABS usage.

Blown fuse or electrical issues

One of the easiest fixes for a bad cruise control system is to just replace a blown fuse. If this happens, you can just take a look at the fuse box by referring to the owner’s manual of your vehicle for the exact location. Usually, there’s a fuse box under the hood or just the left of the steering wheel in the car’s interior.

If there’s a circuit short, the fuse might blow, and simply replacing it will bring the system back on again. Also, other electrical issues can occur such as a bad connection with the control buttons on the steering wheel or electrical connections

Bad brake pedal switch

The cruise control system in your car is connected to the brake pedal switch. It’s the switch that communicates with your tail lights and turns them on as you press the brake pedal. If the switch goes bad, the signal gets interrupted, and it can reflect on your cruise control system as well.

Most cruise control systems are designed to disengage as you press the brake. So, if the computer believes the brakes are pressed due to a faulty switch, it will turn off the cruise control system.

Worn mechanical cable for older cruise control systems

As mentioned, old cars with cruise control often use a cable that locks the accelerator in place as you activate the system. This ensures that the accelerator pressure stays the same during the time the system is active.

The mechanical system also uses an actuator and hoses, and these could all wear off due to frequent usage. So, if any of the mechanical components malfunction, you won’t be able to use the cruise control system.

Fixing a failed cruise control system

If your cruise control system works on some occasions, while it fails on others, don’t use it while driving. It’s not safe and the best thing you can do is inspect the system based on the reasons behind a malfunctioning cruise control.

You can do some repairs yourself, including testing and replacing a blown fuse. On the other hand, you’ll need the help of the mechanic to replace a bad actuator in mechanical systems or to fix the brake pedal switch.

Overall, if you spot your cruise control not working, you shouldn’t use it while driving until you make the repairs. Some systems will fail on some occasions, while you’ll sometimes be able to use them regularly. It’s still better to inspect the system based on the common reasons behind its failure listed in this guide and make proper repairs.

This way, you can save yourself some trouble, along with gas and effort while driving with the cruise control system active.

What could cause the cruise control to stop working?

A blown fuse or a faulty brake pedal switch could cause the cruise control to stop working, along with malfunctioning sensors.

How do I know if my cruise control fuse is blown?

You can know if your cruise control fuse is blown by taking a look at the fuse box, and you can find the fuse box location in the owner’s manual.

Where is the fuse for the cruise control?

The fuse for cruise control is located within the fuse box under the hood or at the left of the steering wheel.

How much money does it cost to fix cruise control?

It costs anywhere from $10 for a replacement fuse, to $500 for the actuator or the throttle body repair to fix the cruise control system.

Filip is a lifelong car enthusiast with over 3 years of experience writing about cars and had worked as a mechanic apprentice for over 5 years, gaining hands-on expertise in automotive mechanics. At REREV, he combines his passion for cars with his comprehensive knowledge to provide readers with a unique blend of technical insight and engaging storytelling that sets the bar high for automotive content.

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Cruise control reduces stress and fatigue on long drives, but if the system isn't working properly, it can become dangerous. If your vehicle's cruise control isn't working, one of the following nine issues may be the root cause.

How Cruise Control Works

Cruise control is a system to maintain vehicle speed without direct driver input. When you want to engage cruise control, you first turn the system “On” with a button or switch. However, this alone does not start the cruise control. When you “Set” cruising speed, the cruise control module (CCM) records the current speed, then takes control of the throttle body to maintain vehicle speed. When vehicle speed increases or decreases (due to wind or hills, for example), the CCM decreases or increases throttle body opening accordingly.

By modulating engine speed, the CCM can maintain your desired cruising speed on the highway. You can increase or decrease cruise speed by tapping a button or lever, and you can cancel cruise control by hitting the “Cancel” or “Off” buttons or stepping on the brake.

Throttle body control has changed over the years. Early systems used a vacuum motor and cable, but these eventually changed over to electric motors. Most recently, with the development of drive-by-wire or electronic throttle control systems (ETCS), cruise control is built into the engine control module (ECM), which controls the throttle body electronically.

Basic cruise control systems still require the driver to pay attention to changing road and traffic conditions. Adaptive cruise control systems, sometimes called "smart" cruise, use radar or laser detection to maintain safe distances from vehicles ahead. Some adaptive cruise control systems merely reduce engine speed to maintain distance, but some of the newest adaptive cruise control systems can also engage the brakes to slow or stop the vehicle. Still, even with adaptive cruise control, it's important that drivers never take their eyes off the road.

Why Is My Cruise Control Not Working?

There are a few basic ways that cruise control can fail, depending on how the system is designed. You may not be able to do much about ETCS cruise control systems, but there are a few things you can check:

Brake Light Switch – As cruise control is automatically cancelled by depressing the brake, some vehicles may disengage cruise control if it cannot detect the brake light switch.

Brake Lights – In some systems, cruise control is disabled when a brake light is blown. Aftermarket lighting, such as LED brake light conversion, might trick the CCM into thinking a brake light is blown, as LED bulbs draw less current than incandescent bulbs.

Fuses and Relays – On some vehicles, fuses and relays are used to protect the cruise control actuator circuit . If the fuse is blown or the relay is faulty, the system won’t work.

Spiral Cable – Many vehicles mount the cruise control switch on the steering wheel. A faulty spiral cable may have an open circuit, preventing the switch from contacting the CCM.

Control Switch – If the internal contacts wear out, the cruise control switch may not be able to contact the CCM. This might disable cruise control completely, or it might not react to the cancel or accelerate functions.

Check Engine Light – On some modern vehicles, particularly those equipped with ETCS, cruise control may be disabled if there is an engine or transmission problem .

Vacuum Leak – Some older vehicles used vacuum actuators to control the throttle body during cruise control operation. If there is a leak, such as a cracked hose or tube, the system won’t work. A vacuum leak might cause the engine to idler higher or set a fuel trim code.

Vehicle Speed Sensor – There are usually multiple vehicle speed sensors (VSS) on any given vehicle. The CCM might use a VSS feed from the ECM, instrument cluster, or transmission. If that signal is lost, the CCM can’t detect vehicle speed, disabling cruise control.

Electrical Problems – As most cruise control systems use electrical or electronic components, any diagnosis should include a thorough check of source voltage, wiring harnesses, and connectors. Anything loose or broken could disable the system entirely.

If your cruise control isn’t working properly, avoid using it until it is repaired. A faulty cruise control system may not cancel on demand, which will create a safety hazard for you and those around you. After assessing your cruise control yourself, take your vehicle to a trusted mechanic for a check or a couple diagnosis and repair.

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Fixing Faulty Cruise Control

Alarmingly, the speedometer needle steadily winds down from 75 mph toward 50. Just as you uncurl your feet and try to accelerate back to traffic speeds, the vehicle downshifts with a lurch and abruptly climbs back to over 80 mph. So you tap the brakes and disengage the cruise control to avoid a conversation with one of the many law enforcement officers lurking behind every other billboard. Toggling the Resume switch settles things down, holding to a legal speed on both the uphill and downhill sections of the interstate. The kids in the back seat have stopped threatening to throw up, too. Then you look in your mirror 20 miles later and see the lights. Red and blue flashing lights. You're doing over 85 mph and, odds are, Smokey isn't going to believe you have the cruise set to 70. Time to find out why your cruise control has a mind of its own.

IT'S NOT A BUG, IT'S A FEATURE Does your cruise control fall out of engagement partway up steep hills? Actually, it will normally drop out if the engine has to work too hard, mainly because after a while there isn't enough vacuum left to pull in the servo after sustained near-wide-open-throttle. You'll just have to put your foot into it. Downshifting helps.

Does your Japanese car not remember the set speed after tollbooths? Unlike most American and European cars, some Toyotas and Hondas are designed not to remember their set speed if the vehicle speed falls below 25 mph, and you're supposed to accelerate the vehicle to your set speed and hit the Set button again. Annoying, but that's the way they were designed.

Do you have to ride the brakes on longer downhills to keep from building up excess speed? That's normal too. The cruise control only has authority to reduce engine speed to idle. It doesn't activate the brakes. Modern cars, in an attempt to improve mileage, have very tall gear ratios, low-friction engine designs, low-rolling-resistance tires and optimized aerodynamics. That long downgrade outside of town may have accelerated your '60s-era Pontiac to only a couple of miles per hour above legal. But, it may well propel your new economy car to blatantly illegal velocities unless you intervene by braking or downshifting.

WHAT'S THAT HISS?: Most common cause of erratic cruise control? Vacuum leaks caused by deteriorated hoses.

SMOOTH AND STEADY Cruise control on your vehicle is a terrific device. It substantially reduces the driver's workload on longer trips, and can save substantial amounts of fuel and expense over the life of the vehicle--until it stops working.

We'll get to the scenario of not holding a steady speed later, but here are a couple of things to check immediately if the cruise control is on strike.

Does the Cruise icon on the dash light up when you turn the switch on? Duh. Check the fuse. You may need to look in the owner's manual to see which one if it's not tagged on the fuse box cover. An aftermarket cruise may have an inline fuse holder in the wiring to the controller.

If there is power to the system, the next check is the brake lights. Brake lights? Yup, cruise controls have a switch to toggle them off when you touch the brake pedal, and many use the same switch as the brake lights. If one of the brake lights has failed, the cruise control thinks the brakes are on all the time and won't come on. Same result if the switch is incorrectly adjusted or broken or jammed. Wait, there's more--if your vehicle has a manual transmission, there's a similar switch on the clutch pedal. You may need to break out a test light or multimeter to verify the function of this array of switches. These switches usually are normally closed switches, and close their contacts when the pedal is depressed. We've seen several cases of intermittent cruise control dropout caused by a brake light switch that was adjusted very tight. Any small bump would jiggle the brake pedal down far enough to toggle the brake lights on for a brief instant--long enough to shut down the cruise. Adjusting the switch to specs (usually so the brake lights come on after the pedal travels 1/2 in.) fixed it.

Once you verify all of these things, it's time to look for more subtle causes. Check underhood. Inspect the linkage between the cruise control actuator and the throttle. It may be as simple as a toilet-tank bead chain or a separate throttle cable with its own actuator cam to the throttle body. Look for disconnected or damaged wiring to the controller or actuator, particu-larly if it's an aftermarket system, which may have been installed by someone with poor mechanical skills.

Another obvious failure point is the vacuum line to the actuator. If it has fallen off, there's no vacuum to the actuator and no force can be applied to the throttle. We'll get ahead of ourselves here and mention that a vacuum line that looks fine may have a subtle leak caused by aging, brittle rubber or connections that don't seal well. A lot of the cruise controls we've seen with issues in regulating their speed correctly are fixed by simply replacing all the vacuum lines between the servo, vacuum reservoir (if there is one) and the intake manifold vacuum supply.

WHOA, NELLIE!: If your brake light switch is incorrectly adjusted, your cruise control may not lock in. A burned-out brake light can do the same.

WHAT'S THIS THING?: The cruise control servo motor could be anywhere in the engine compartment.

CONTROL ISSUE WITH YOUR SERVO There are two main components of the cruise control system: the controller and the servo.

The controller integrates all the inputs and tells the servo how far to actuate the throttle plates. Normally, there is no way you can service this item, so if you trace a problem to the controller, you'll have to buy a new one. A bad controller probably will require a service manual for specific diagnostics. You'll also need a scan tool to access any computer trouble codes to boot.

The servo does the work of moving the throttle blades to speed up the vehicle. Conventional systems are actuated by manifold vacuum. Check the linkage from the servo to the throttle to ensure it's properly hooked up and not binding or sticky. Inside the servo is a diaphragm that moves to pull on the linkage. Some older systems, used on cars or trucks that don't have throttle-position sensors, may have a rod that moves in and out of a magnetic coil to tell the controller the throttle position. There are also two electrically operated solenoid valves. One valve admits vacuum to the diaphragm chamber to add more throttle. The other bleeds air back into the chamber to reduce throttle. Normally, they will never be open at the same time, so if one is sticky or leaking, cruise control operation will be erratic at best. Check for leakage with a handheld vacuum pump. A leaky valve may benefit from a quick shot of silicone spray.

Diesels and some late models may use a servo that is completely electrical. These usually are mounted on the fenderwell or firewall, and are connected to the throttle by a second throttle cable. Other than keeping the cable lubricated and properly adjusted, there's not much to fiddle with. As always, check the shop manual for specifics on your vehicle.

Many late-model cars have throttle plates connected directly to an actuator controlled by the engine management computer. There is no physical connection between your right foot and the throttle blades (Scary, eh?), and there may or may not be a separate cruise control servo or controller.

HOW FAST WAS I GOING, OFFICER? If you still have no engagement, there may be an issue with the cruise control's speed input. Modern cars use information from the ABS's vehicle speed sensor (VSS) because the engine-management computer needs to know road speed. If your Check Engine light is on, the cruise may not work, especially if the VSS is malfunctioning. Older vehicles may use speed information from the speedometer. Aftermarket systems may resort to a ring of magnets clamped to a driveshaft or axle shaft, with a magnetic coil positioned nearby. If the magnets have fallen off or the coil has been smashed by a rock or road debris, there's no speed data for the controller.

URBAN LEGEND The legend has been related to us by all manner of people, including a couple of state police officers. Using the cruise control in rainy or slick conditions will make your car speed up uncontrollably, until you lose control and crash. It's a myth. Engaging the cruise will not make the car speed up. The cruise will attempt to maintain a steady speed. If the wheels lose traction and the car starts to slow down, the cruise will speed up the engine to attempt to accelerate back to the set speed. This will make the drivewheels spin more briskly. The vehicle speed will go slower, regardless of how furiously the wheels spin. If you have a rear-wheel-drive car, the effect is to destabilize the vehicle, and you probably will spin out unless the vehicle regains traction in a reasonable length of time. A front-wheel-drive car with spinning tires will attempt to continue in a more or less straight line--which will make steering control dodgy at best.

Heavy rain or snow makes use of the cruise control inadvisable, but such conditions certainly won't make your car accelerate to ludicrous speeds while you hang on for dear life. If the cruise is engaged and you perceive a loss of traction, the best bet is to tap the brake to disengage the system, and then add just enough throttle to maintain steering until the vehicle slows down to a more appropriate speed.

WHERE'S THIS THING?: Speed sensor may be buried under the dash near speedo head.

SUCK IT UP: The vacuum reservoir provides an added source of vacuum for those long uphill grades.

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Cruise Control In Cars Explained (And How To Safely Use It)

Have you ever wished you could set your car's speed and just sit back and relax while driving on a long stretch of highway? If that's the case, then cruise control is just the ticket you've been searching for—and the good news is, it's a standard feature in most cars these days!

Cruise control is a handy feature for drivers that allows you to maintain a constant speed without having to keep your foot on the gas pedal. In this post, we'll explore how cruise control works, its benefits, and how to use it safely to make your driving experience more comfortable.

Understanding Cruise Control

Cruise control, also known as speed control, is an electronic system that allows you to maintain a specific speed without manually controlling the accelerator pedal. The system uses sensors and electronic components to control the throttle and keep your car moving at a desired speed. First introduced in the late 1950s, cruise control has since become a standard feature in most modern vehicles you see on the road today.

How Does It Work?

At its core, cruise control involves a series of sensors that monitor the vehicle's speed and a control unit that regulates the throttle. When the driver sets the cruise control to a specific speed, the system adjusts the throttle to maintain that speed. If the car begins to slow down because of an incline (e.g. going up a hill), the system will open the throttle to accelerate. Conversely, if the car starts to speed up due to a declin (e.g. going downhill), the system will close the throttle to decelerate.

Modern cruise control systems also come with additional features like adaptive cruise control (ACC), which uses radar or cameras to detect vehicles ahead and automatically adjusts the speed to maintain a safe following distance (more on this BELOW).

The History of Cruise Control

The invention of cruise control can be traced back to the late 1940s and early 1950s, when engineer Ralph Teetor developed the first-speed control system. This innovative feature was designed to help drivers maintain a steady speed, reduce fatigue while driving, and improve fuel efficiency. Over the years, cruise control technology has undergone significant advancements, leading to the development of sophisticated systems like adaptive cruise control.

Types of Cruise Control Systems

Today, drivers can choose from a range of cruise control systems, each with its own unique features and functionalities.

Conventional Cruise Control

Conventional cruise control is like your old reliable friend. It's pretty basic and doesn't have any fancy bells and whistles. You just set the speed you want, and it'll keep your car cruising along at that speed, no problem. It's perfect for those long drives on open highways, but it doesn’t automatically react to other cars on the road.

So, if the car in front of you slows down, you'll need to step in and adjust your speed manually. This trusty system comes standard on most cars and is great for saving some fuel on those long road trips .

Adaptive Cruise Control (ACC)

Now, if conventional cruise control is your old reliable friend, then Adaptive Cruise Control (ACC) is like that friend's tech-savvy younger cousin. ACC isn't just maintaining your set speed, it's also keeping an eye on the car in front of you. If that car slows down, ACC slows your car down to keep a safe distance .

It's like having an extra set of eyes on the road, making highway driving a breeze. Plus, some ACC systems can even handle stop-and-go traffic, bringing your car to a full stop and then picking up speed again when traffic gets moving.

Predictive Cruise Control

Predictive Cruise Control is like the fortune teller of cruise control systems. It uses GPS and map data to see into the future and predict what's coming up on the road, like hills or curves, and adjusts your speed accordingly. This means you get a smoother ride and better fuel efficiency, but it all depends on the quality of the GPS and map data. If that's a bit out of date, your fortune-telling cruise control might not be so accurate. It's usually found in more high-end vehicles where top-notch fuel efficiency is a focus for the engineers.

Cooperative Adaptive Cruise Control (CACC)

And then we have Cooperative Adaptive Cruise Control, or CACC. This is like the team player of cruise control systems. It allows cars to talk to each other, coordinating their speeds to maintain a safe distance. It's like having a well-coordinated team of cars all working together to make the traffic flow smoother and reduce congestion. Picture it like a synchronized dance on the highway, where every car knows its place and keeps the right distance. This tech is still pretty new, but it's got a lot of potential. Imagine a future where traffic jams could be a thing of the past.

Remember, these systems are here to make your drive smoother and safer, but they're not a replacement for your attention. No matter how fancy your cruise control is, these systems can be greatly influenced by external conditions like weather and traffic, and they should always be used as aids, not replacements, for attentive driving.

Common Cruise Control Symbols and Indicators

Understanding the various symbols and indicators associated with cruise control is important for safe and effective usage. These symbols typically appear on the dashboard (or on the side of the steering wheel) and may include a speedometer icon, "SET," "RES" (resume), and "CANCEL". Be sure to consult your vehicle's owner's manual for specific details and explanations of these symbols.

Benefits of Using Cruise Control

Cruise control offers several benefits to drivers, especially during long road trips or highway driving.

Fuel Efficiency

One of the main advantages of using cruise control is improved fuel efficiency. By maintaining a constant speed, cruise control helps reduce fuel consumption, leading to better gas mileage. Rapid acceleration and deceleration, on the other hand, can lead to increased fuel consumption.

Comfort and Convenience

Cruise control allows drivers to take their foot off the accelerator pedal, reducing fatigue and improving comfort during long drives. It also helps drivers avoid unintentionally exceeding the speed limit by setting a maximum speed.

When used correctly, cruise control can contribute to safer driving. By maintaining a steady speed, it reduces the likelihood of erratic driving behavior and potential accidents. However, it is important to note that cruise control shouldn't be used in certain conditions, such as heavy traffic or slippery roads .

Troubleshooting Common Cruise Control Issues

Occasionally, you may encounter issues with your cruise control systems. Common problems include cruise control not engaging or disengaging unexpectedly. Possible causes may include a faulty brake light switch, malfunctioning sensors, or issues with the control module. If you experience any problems with your cruise control, it's best to have a qualified technician diagnose and repair the issue for you.

Cruise Control and Road Etiquette

Practicing proper road etiquette while using cruise control is essential for a safe and pleasant driving experience. Here are some tips on how to use cruise control courteously:

• Avoid using cruise control in heavy or congested traffic, as it may hinder your ability to react quickly to changing conditions.
• Be mindful of other drivers when setting your speed. Avoid setting a speed that's significantly slower or faster than the flow of traffic.
• If you are in the passing lane and using cruise control, be sure to adjust your speed or temporarily disengage the system to allow faster-moving vehicles to pass.
• Always signal your intentions, such as lane changes or exiting the highway, even when using cruise control.

The Future of Cruise Control Technology

Cruise control technology plays a vital role in the development of autonomous vehicles, or self-driving cars . In autonomous vehicles, cruise control systems work together with other advanced driver assistance systems (ADAS) to enable the vehicle to operate without direct driver input. These systems include lane-keeping assist, automatic emergency braking, and collision avoidance systems.

As autonomous vehicles become more sophisticated, cruise control technology is evolving to support higher levels of automation. For example, some autonomous vehicles are equipped with advanced cruise control systems that can navigate complex traffic scenarios, merge onto highways, and even change lanes autonomously.

While fully autonomous vehicles are still in the developmental stages, the integration of cruise control technology is a big step toward creating safer and more efficient transportation systems.

As automotive tech continues to advance, cruise control systems are becoming more intelligent and capable. Here are some potential developments we can expect to see in the future of cruise control technology:

• Integration of artificial intelligence (AI) to improve decision-making and responsiveness in adaptive cruise control systems.
• Enhanced connectivity and vehicle-to-vehicle (V2V) communication, enabling cars to share information about traffic conditions and coordinate their speeds for smoother traffic flow.
• Greater customization and personalization options, allowing drivers to set preferences for cruise control behavior, such as following distance and speed adjustments.

Overall, the future of cruise control technology holds promise for creating a more seamless and enjoyable driving experience, with a focus on safety, comfort, and sustainability.

Debunking Myths About Cruise Control

Let's address and debunk some common misconceptions about cruise control:

Myth : Cruise control can be used as a substitute for driver attention.

Fact : Cruise control is a driver assistance feature, not a replacement for attentive driving. Drivers should always remain alert and ready to take control when necessary.

Myth : Cruise control increases the risk of accidents.

Fact : When used appropriately, cruise control can contribute to safer driving by maintaining a steady speed and reducing erratic driving behavior.

Cruise control is a valuable feature that can enhance your driving experience by providing comfort, convenience, and fuel efficiency. Remember to use it safely and appropriately based on driving conditions, and always stay attentive while on the road.

If you found this post informative and want to learn more about car features, driving tips, and automotive technology, be sure to subscribe to our newsletter for regular updates. We're here to help you stay informed and enhance your driving experience.

Frequently Asked Questions About Cruise Control

To further enhance your understanding of cruise control, here are answers to some common questions:

Q : Can cruise control be used in all weather conditions?

A : It isn't advisable to use cruise control in adverse weather conditions, such as heavy rain, snow, or icy roads, as it may reduce your ability to respond quickly to changing road conditions.

Q : Can I use cruise control in urban areas with frequent stop-and-go traffic?

A : Cruise control is best suited for open roads and highways with consistent traffic flow. It isn't recommended for use in urban areas with frequent stops or heavy traffic.

Q : Does cruise control work at any speed?

A : Cruise control typically has a minimum speed threshold, below which it can't be engaged. This threshold varies by vehicle, so check your owner's manual for specific information.

About the Author: This article was crafted by the LOOP Marketing Team. Comprising of seasoned professionals with expertise in the insurance industry, our team is dedicated to providing readers with accurate, up-to-date, and valuable information. At LOOP, we're passionate about helping families navigate the world of car insurance, ensuring they get the best coverage at the most affordable rates. Learn more about our mission and values here.

For more insights on auto insurance and other related topics, visit our blog .

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How to Use Cruise Control: Specific Things You Need to Know Well

Discover expert insights and practical tips on using cruise control effectively. This comprehensive guide covers everything from basic operations to advanced features, safety tips, and troubleshooting.

Written by Andrei Zakhareuski. With over 16 years of expertise, Andrei leads Driving-Tests.org, a top online resource for driver education. His leadership has established vital partnerships with over 2,600 libraries, educational bodies, and state agencies.

Cruise control is a valuable feature in many modern vehicles, enhancing convenience and efficiency, especially during long drives. This guide delves into the intricacies of using cruise control, offering expert insights, technical details, safety tips, and more.

​ Understanding Cruise Control

​ what is cruise control.

Cruise control is an electronic system that allows a vehicle to maintain a steady speed set by the driver . Cruise control is designed to be used on roadways without frequent stops. It’s ideal for use on highways and long stretches of road with minimal stops or turns.

​ Types of Cruise Control

• Standard cruise control maintains a set speed until manually overridden.
• Advanced systems, like adaptive cruise control , automatically adjust speed based on traffic conditions.

​ Operating Cruise Control

• Adjusting Speed

Before activating cruise control, ensure conditions are safe. It’s not advisable to use cruise control in hazardous weather or heavy traffic.

​ Safety Tips

Remain vigilant and ready to deactivate cruise control instantly in case of an emergency or changing traffic conditions.

Speed Limits

Always adhere to speed limits. Cruise control should not be used to maintain speeds above legal limits.

​ Advanced Features

Adaptive Cruise Control

This modern feature uses sensors and radar to maintain a safe distance from the vehicle ahead, adjusting speed automatically.

​ Troubleshooting Common Issues

System Not Activating

If your cruise control doesn’t activate, start with the basics. Ensure it’s turned on and you’re at the right speed (usually above 25-30 mph). If these aren’t the issues, it might be a blown fuse, a faulty brake pedal switch, or a defective speed sensor. Check your vehicle’s manual for fuse information and consider a professional inspection of the brake pedal switch and speed sensor.

Failing to Maintain Set Speed

Trouble maintaining the set speed often points to sensor issues. Speed sensors inform the cruise control system. If these sensors are dirty or malfunctioning, the system might not maintain the speed. Cleaning sensors and checking for obstructions can help. Also, consider checking wheel alignment and tire condition, as these can affect performance.

Erratic Speed Changes

If your vehicle experiences erratic speed changes with cruise control engaged, this could indicate a problem with the throttle control system or the vehicle’s computer system. These complex issues generally require professional diagnostics and repair.

Adaptive Cruise Control Problems

With adaptive cruise control, problems can arise from blocked sensors or system malfunctions. Ensure that the sensors, often located in the front grille or under the mirrors, are clean and unobstructed. For system malfunctions, professional diagnostics are essential, as these systems involve advanced electronics and software.

​ Comparative Analysis of Modern Cruise Control Systems

In the realm of modern vehicles, cruise control systems have evolved significantly, offering a range of functionalities tailored to enhance driving experience and safety. Here’s a comparative analysis of several popular systems.

Tesla Full Self-Driving (FSD) Beta

Tesla’s FSD Beta represents a leap forward in autonomous driving technology. It’s not just a cruise control system but an advanced driver-assistance system capable of navigating complex driving scenarios. Key features include automatic lane changes, stop sign and traffic light recognition, and the ability to navigate city streets. While it offers substantial automation, it still requires driver supervision and isn’t fully autonomous.

GM's Super Cruise

General Motors’ Super Cruise system is available in select Cadillac models and provides hands-free driving assistance on compatible highways. It uses LiDAR map data, high-precision GPS, and a driver attention system to ensure safety. Unlike Tesla’s FSD, it’s limited to highway use but excels in hands-free driving comfort and safety.

Ford Co-Pilot360

Ford’s Co-Pilot360 includes adaptive cruise control with stop-and-go and lane-centering. It’s less about hands-free driving and more about reducing driver fatigue and enhancing safety. This system is excellent for everyday driving, offering features like speed sign recognition and evasive steering assist.

Mercedes-Benz DRIVE PILOT

Mercedes-Benz DRIVE PILOT system pushes towards Level 3 autonomy, allowing drivers to hand over control under certain conditions, like heavy traffic or on highways. It uses a sophisticated array of sensors and cameras, offering a smooth and intuitive driving experience. It’s more advanced than traditional systems but still requires driver attention.

BMW's Driving Assistant Professional

BMW offers the Driving Assistant Professional system, which includes features like adaptive cruise control with stop-and-go, lane-keeping assistant, and traffic jam assistant. It’s designed for convenience and safety, providing a balanced mix of automation and driver control.

Each system has its strengths and caters to different driving needs and preferences. Tesla’s FSD Beta is at the forefront of autonomy but requires active supervision. GM’s Super Cruise excels in hands-free highway driving, while Ford’s Co-Pilot360 focuses on safety and driver assistance for everyday use. Mercedes-Benz and BMW offer systems that blend convenience, safety, and a step towards higher autonomy, maintaining a balance between automated and manual driving.

This comparison highlights the diversity in cruise control technologies, illustrating how each brand tailors its system to specific driving experiences and safety standards.

​ Real-World Impact

Cruise control technology not only adds convenience to driving but also significantly impacts safety and efficiency. This section delves into the real-world implications of using cruise control, supported by safety statistics and research findings.

The integration of cruise control in vehicles has been a game-changer in terms of driving safety and efficiency. Here are some key impacts:

Reduced Driver Fatigue : Continuous concentration over long drives can lead to driver fatigue, a leading cause of road accidents. Cruise control allows drivers to maintain a constant speed without constant pedal adjustment, reducing the physical and mental strain during long journeys.

Improved Fuel Efficiency : By maintaining a steady speed, cruise control helps in reducing fuel consumption. Studies have shown that erratic speed variations can lead to higher fuel consumption, whereas maintaining a consistent speed optimizes fuel efficiency.

Safety Statistics : Research indicates that the use of cruise control can lead to a reduction in speed-related accidents. However, it’s crucial to note that over-reliance on cruise control in inappropriate conditions (like city driving or in heavy traffic) can negate these safety benefits.

Impact on Traffic Flow : When used widely, cruise control can contribute to smoother traffic flow on highways. Consistent speeds help in reducing the frequency of braking and acceleration among vehicles, leading to less congestion and smoother traffic movement.

It’s important to balance the use of cruise control with active driving engagement, ensuring that safety is always the top priority.

For a deeper understanding of cruise control and its various aspects, it’s always beneficial to refer to your vehicle’s manual and seek guidance from automotive professionals.

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• Understanding Cruise Control
• What is Cruise Control?
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• Safety Tips
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• Troubleshooting Common Issues
• Comparative Analysis of Modern Cruise Control Systems
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When You Should & Shouldn’t Use Cruise Control While Driving

Cruise control has long been a popular feature in many vehicles. While it’s somewhat helpful for long trips, it also tempts drivers to sacrifice safety for convenience. However, drivers may have difficulty knowing when it’s safe to use cruise control features on the road. Here’s an overview of what cruise control does and when it’s better to drive manually.

What Is the Difference Between Conventional Cruise Control and Adaptive Cruise Control?

Conventional cruise control is a relatively older form of automatic acceleration that maintains a speed set by the driver. In other words, it doesn’t adapt to surrounding conditions and stays constant until shut off. For example, if you have cruise control set to 60 mph, the vehicle maintains that speed until you manually brake, accelerate, or turn off cruise control.

In contrast, adaptive cruise control (ACC) is a newer form of automatic acceleration that uses radars or sensors to adjust speed. This means that if a car in front of you slows down, the ACC matches their speed. Once the car moves out of the way, ACC returns to the speed you set. The one thing ACC has in common with conventional cruise control is that it stops once you manually alter speed or turn it off.

Can You Break in an Emergency?

Yes, manually braking while using cruise control slows down the vehicle. However, it also shuts off the cruise control settings. If you want to leave cruise control settings on, you may alternatively lower your cruising speed. This may be a button on your wheel or dashboard.

What Are the Benefits of Cruise Control?

There are a few notable benefits of using cruise control instead of accelerating manually. Since the computer handles acceleration, you are less likely to rev the engine. This not only saves gas but also reduces the wear and tear on your engine. In addition, it helps you focus on steering and reduces foot pain from constant pedal usage.

Is Cruise Control Dangerous?

Since the advent of cruise control, there have been a few studies done on its impact on accidents. According to a recent study by the Insurance Institute for Highway Safety (IIHS), drivers speed more often when using cruise control than when driving manually.

This difference was most apparent on limited-access roads with a lower speed limit. In addition, those who disobeyed the speed limit while using cruise control sped faster than those without it.

Contrasting this study is another report by the National Highway Traffic Safety Administration from 2008. They found that ACC accommodated 12 out of 14 braking emergencies. Although the two severe emergencies required driver intervention, drivers intervened quickly enough due to the notifications from the vehicle.

Another thing to remember is how certain cruise control systems work in low visibility settings. Adaptive cruise control can be particularly dangerous when driving in fog or other low visibility instances. This is because the sensors may not work properly if they can’t detect other vehicles or objects. You may be lulled into a false sense of security in low-visibility driving conditions if you’re accustomed to your ACC alerting you.

So does this mean that cruise control is dangerous? Yes and no. Ultimately, cruise control has the potential to encourage drivers to make poor decisions. However, if drivers maintain a safe speed and remain vigilant, ACC helps reduce accidents. Despite this, it’s best to use the cruise control only when necessary.

The Best Times to Use Cruise Control

The primary purpose of cruise control is to help drivers avoid foot fatigue while driving for long periods, such as road trips. Thus, you should use cruise control only when driving on a highway or interstate in dry conditions. Even then, make sure to keep your feet near the pedals and follow the posted speed limit. If it’s raining or if there’s low visibility, it’s best to drive manually instead.

When Not to Use Cruise Control

Although modern forms of cruise control have many automatic safety features, there are times when they don’t help.

If drivers find themselves in serious accidents while using cruise control, they should contact an experienced injury lawyer as soon as possible.

To stay safe and avoid accidents while using cruise control, here are a few tips to follow while you drive:

• Driving around town –  As mentioned before, cruise control is best suited for driving on long stretches of highway. Driving around town has many more variables, such as pedestrians, cyclists, etc. Enabling cruise control, if your vehicle allows you to at low speeds, is dangerous in this regard.
• You are sleepy or fatigued –  Some may think that cruise control makes driving easier when tired. However, since it takes your attention away from the road, it increases your risk of falling asleep at the wheel. In addition, cruise control doesn’t steer your car or brake for you.
• The roads are wet or icy –  Even if your vehicle has traction control, it’s safer driving manually during adverse weather conditions . Cruise control may cause an accident by spinning your wheels faster when they don’t catch. This leads to hydroplaning in many scenarios.
• Driving on winding roads –  When going around corners or curves, you must brake to maintain control of the vehicle. However, cruise control prevents this by maintaining a constant speed, even around corners.
• You encounter heavy traffic –  If you use cruise control on the highway, you should disengage it once traffic slows. Conditions on a highway may change at any time, so try exercising caution if you encounter congestion or other traffic issues.
• When you’re unfamiliar with the controls –  It’s always best to familiarize yourself with the controls in the vehicle. This goes for everything on the dashboard, but it’s especially true for cruise control. If you find yourself fumbling around trying to switch it on, it’s best just to drive manually. This situation usually arises when you get a new car, are driving a rental, or have borrowed a car.

By following these steps, you’ll keep you and your passengers safe from conditions that may lead to a car accident.

In short, cruise control isn’t inherently dangerous, but it isn’t always the safest option either. If you are on a long road trip and the highway is relatively straight, cruise control may help reduce foot fatigue. However, if it’s raining or if there’s a lot of traffic, it’s better to drive manually just in case. Understanding these nuances is essential and empowers drivers to make safer decisions while on the road.

When and How Should You Turn OFF Cruise Control? A Guide to Safe Usage

A Quick Overview

Picture yourself cruising down the open road, enjoying the scenery and feeling the wind in your hair. You’ve engaged cruise control so you can sit back and relax while your car maintains a steady speed. It’s convenient, it’s easy - but is it always safe? As with any technology, there are both benefits and risks to using cruise control on your vehicle. In this guide, we’ll explore when and how to turn off cruise control for maximum safety on the road. Whether you’re a seasoned driver or just starting out behind the wheel, read on to discover everything you need to know about this popular feature!

What is Cruise Control and How Does it Work

Cruise control is a feature found in many modern vehicles that allows drivers to set a constant speed for their car without having to maintain pressure on the accelerator pedal. It’s often used on long stretches of highway driving, where maintaining a consistent speed can help reduce driver fatigue and increase fuel efficiency.

There are two main types of cruise control: traditional and adaptive. Traditional cruise control maintains a constant speed regardless of any changes in road conditions or traffic flow, while adaptive cruise control uses radar or other sensors to adjust the vehicle’s speed based on its surroundings.

To engage cruise control, the driver usually presses a button or switch located on the steering wheel or dashboard. The system then takes over throttle operation and maintains the desired speed until it’s turned off manually by the driver (or automatically if certain conditions are met).

While cruise control can be useful in many situations, it’s important for drivers to understand how it works and when it should - and shouldn’t - be used for maximum safety on the road.

Advantages and Disadvantages of Using Cruise Control

Using cruise control has both advantages and disadvantages. On one hand, it can help you maintain a steady speed on the highway without having to constantly adjust your foot on the gas pedal. This can lead to improved fuel efficiency and less fatigue for the driver over long distances.

However, there are also some potential downsides to using cruise control. For example, if you become too reliant on it, you may not be as alert or engaged behind the wheel as you should be. Additionally, in certain situations such as heavy traffic or inclement weather conditions, it’s often better to have more direct control over your vehicle’s speed rather than relying on an automated system.

Whether or not you choose to use cruise control is a personal decision that depends on factors like driving conditions and individual preferences. It’s important to weigh both the pros and cons before making a choice so that you can stay safe and comfortable while behind the wheel.

When to Use Cruise Control:Best Practices

Cruise control is a great feature that can make long drives much easier and more comfortable. But when exactly should you use it? Here are some best practices for using cruise control:

Always be aware of your surroundings before turning on cruise control. It’s important to only use it in appropriate situations where there is little traffic and the road conditions are good.

Consider your speed when using cruise control. It works best at higher speeds on highways or freeways with minimal curves or turns.

Avoid using cruise control in wet or slippery conditions, such as rain or snow. This will help prevent accidents caused by hydroplaning or skidding.

Fourthly, remember that even with cruise control engaged, you still need to remain alert and attentive behind the wheel. Don’t let yourself become complacent just because the car is doing most of the work for you.

If you’re driving on hilly terrain with frequent changes in elevation, it may be better to turn off cruise control altogether to maintain greater control over your vehicle’s speed.

By following these best practices for using cruise control, you can enjoy a safer and more relaxed driving experience while also conserving fuel and reducing stress on your body during long trips.

Safe and Efficient Operation of Cruise Control

To safely and efficiently use cruise control, you must understand its limitations and benefits. Before engaging the system, make sure your car is in good working condition, particularly the brakes.

When using cruise control, maintain a safe distance from other cars on the road. This will give you enough time to react if you need to brake suddenly or change lanes. Avoid using it in heavy traffic or when driving on winding roads where there are many curves.

Aim for a steady speed when cruising by gently accelerating and decelerating as necessary with minimal braking. This reduces fuel consumption while ensuring smooth operation of your vehicle. In addition, avoid using cruise control on slippery surfaces such as ice or wet roads.

Always stay alert even when using this feature because it does not replace human judgment and reaction time altogether. Keep both hands on the wheel and be prepared to take over at any moment should anything go wrong.

Never rely too heavily on technology; remember that safety always comes first regardless of whether you’re driving with or without cruise control engaged.

How to Turn Off Cruise Control Step by Step Guide

When you’re driving on a long stretch of highway, it’s easy to get comfortable with cruise control. However, there may be times when you need to turn off your car’s cruise control quickly and safely.

The first step in turning off your cruise control is to identify the button or lever that controls it. In most cases, this will be located somewhere near the steering wheel or dashboard.

Once you have located the cruise control button or lever, pressing it once should deactivate the feature entirely. In some vehicles, however, you may need to hold down the button for a few seconds before it turns off completely.

If your vehicle has adaptive cruise control (ACC), which automatically adjusts speed based on traffic flow ahead of you, there may be an additional step involved in deactivating this feature. Check your owner’s manual for specific instructions related to ACC systems.

Remember that if you are traveling at high speeds when turning off cruise control, your vehicle will naturally begin to slow down as soon as the system is deactivated. Be sure to maintain proper speed and focus on navigating any upcoming curves or hazards on the road ahead.

Knowing how to turn off your car’s cruise control can help keep you safe while driving. Always consult your owner’s manual for specific instructions related to your particular make and model of vehicle.

When Not to Use Cruise Control:Risks and Precautions

While there are many benefits to using cruise control, there are certain situations where it’s best to refrain from using it. One of the biggest risks of using cruise control is when driving in adverse weather conditions such as rain, snow or ice. In these conditions, the road surface can become slippery and unpredictable which can cause your vehicle to lose traction.

Another situation where you should avoid using cruise control is when driving on steep terrain or winding roads. Cruise control was designed for use on flat highways with little traffic and few obstacles, so its use on hilly or winding roads could lead to accidents.

It’s also important not to rely too heavily on your car’s technology. Even though modern cars come equipped with advanced safety features like lane departure warnings and blind spot monitoring systems that can help prevent accidents, they’re only meant to assist you while driving.

Moreover, if you notice any issues with your car’s cruise control system while driving such as sudden acceleration or deceleration beyond what you’ve set manually then immediately turn off the system and bring your car for inspection by a professional mechanic.

Knowing when not to use cruise control is just as important as knowing when it’s appropriate. By understanding the limitations of this feature and taking proper precautions before hitting the road will ensure a safe journey every time!

How to Deal with Malfunctioning Cruise Control

One of the risks associated with using cruise control is malfunctioning. While rare, it can happen and may lead to accidents if not properly addressed. If you experience a malfunction while driving, remain calm and follow these steps.

Turn off your cruise control immediately by pressing the brake pedal or turning off the switch on your steering wheel. This will disengage the system and prevent further acceleration.

Next, check for any visible signs of damage such as loose wires or connections. If you are unable to identify any issues yourself, seek professional help from a mechanic or technician.

It’s important to note that continuing to use cruise control when experiencing malfunctions can be dangerous and should always be avoided. It’s better to be safe than sorry in this situation.

Before hitting the road again after resolving the issue, test your vehicle’s cruise control at low speeds first to ensure that everything is functioning correctly once more.

By being prepared for potential malfunctions with your vehicle’s cruise control system and taking prompt action when required, you can minimize risks on the road and reach your destination safely.

Can You Use Cruise Control in Rain? Safety Tips and Best Practices

When it comes to using cruise control, there are certain situations where you need to be extra cautious. One of those scenarios is driving in the rain. While it may seem like a convenient feature to use during wet weather, there are some important safety tips and best practices that should be followed.

First and foremost, it is essential to reduce your speed when driving in the rain. Wet roads can greatly decrease traction and increase stopping distances, so slowing down will give you more time to react if something unexpected happens.

Another important tip for using cruise control in the rain is paying close attention to your surroundings. Keep an eye out for any hazards on the road such as standing water or debris that could cause skidding or hydroplaning.

Additionally, avoid sudden movements while using cruise control in rainy conditions. Abrupt acceleration or braking can cause loss of traction which could lead to accidents.

It’s also worth noting that some vehicles have automatic emergency braking systems that don’t function properly when cruise control is activated during bad weather conditions; thus manual operation might be safer than relying on automated features alone.

While it may seem tempting to use cruise control while driving in the rain, following these safety tips will help keep drivers safe on slick roads.

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When should you turn off cruise control?

You should turn off cruise control in situations that require increased focus and control, such as in heavy traffic, inclement weather, and on twisty roads. You should also turn it off when descending hills or in any situation where you need to slow down significantly.

How do you turn off cruise control?

To turn off cruise control, you may either press the “off” button on your steering wheel or brake pedal. Some vehicles may also turn off cruise control automatically when the driver applies the brakes.

Is it safe to use cruise control all the time?

While cruise control can be convenient, it is not always safe to use it all the time. In certain situations, it can be hazardous to use cruise control, such as when driving on icy or wet roads, in heavy traffic, or in areas with heavy pedestrian activity.

What are the benefits of using cruise control?

Using cruise control can help reduce driving fatigue, increase fuel efficiency, and maintain a consistent speed. It can also help prevent speeding tickets and improve overall driving comfort.

Can you use cruise control on any road?

While cruise control can be used on most roads, it should be used with caution on roads with sharp turns, steep hills, and varying speeds. Drivers should monitor the road conditions and turn off cruise control if necessary to ensure their safety.

What is adaptive cruise control?

Adaptive cruise control is an advanced form of cruise control that uses sensors to detect the distance and speed of vehicles ahead. It can automatically adjust the speed of the vehicle to maintain a safe following distance.

Can you use cruise control in manual transmission cars?

Cruise control can be used in some manual transmission cars. However, drivers must engage the clutch to shift gears when needed, which can make using cruise control less convenient. It is important to refer to the vehicle’s owner manual to ensure proper usage.

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Tesla cars on autopilot have stopped on highways without cause, owners report

US regulators investigating hundreds of reports that self-driving models 3 and Y have braked on highways

More than 750 Tesla owners have complained to US safety regulators that cars operating on the automaker’s partially automated driving systems have suddenly stopped on roadways for no apparent reason.

The National Highway Traffic Safety Administration revealed the number in a detailed information request letter to Tesla that was posted on Friday on the agency’s website.

The 14-page letter dated 4 May asks the automaker for all consumer and field reports it has received about false braking, as well as reports of crashes, injuries, deaths and property damage claims. It also asks whether the company’s “full self driving” and automatic emergency braking systems were active at the time of any incident.

The agency began investigating phantom braking in Tesla’s Models 3 and Y last February after getting 354 complaints. The inquiry covers an estimated 416,000 vehicles from the 2021 and 2022 model years. In February, the agency said it had no reports of crashes or injuries.

The letter gives Tesla a deadline of 20 June to respond to the information request but says the company can ask for an extension.

A message was left early on Friday seeking comment from Tesla.

In opening the investigation, the agency said it was looking into vehicles equipped with automated driver-assist features such as adaptive cruise control and “autopilot”, which allows them to automatically brake and steer within their lanes.

“Complainants report that the rapid deceleration can occur without warning, and often repeatedly during a single drive cycle,” the agency said.

Many owners wrote in their complaints that they feared a rear-end crash on a freeway. In the letter, NHTSA asks for the initial speed when the cars began to brake, the final speed and the average deceleration. It also asks if the automated systems detected a target obstacle, and whether Tesla has video of the braking incidents.

The agency is now seeking information on warranty claims for phantom braking including the owners’ names and what repairs were made. It is also seeking information on Tesla’s sensors, any testing or investigations into the braking problems, or if any modifications were made.

The letter focuses on Tesla’s testing of the automated systems when it comes to detecting metal bridges, S-shaped curves, oncoming and cross traffic and different sizes of vehicles including large trucks. The agency also wants information on how cameras deal with reflections, shadows, glare and blockage due to snow or heavy rain.

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Pennsylvania to ban cell phone use while driving and require police to collect traffic stop data

Pennsylvania Budget FILE - Gov. Josh Shapiro, D-Pa., speaks at a campaign event, Tuesday, April 16, 2024, in Scranton, Pa. Republican lawmakers on Tuesday advanced legislation for a $3 billion tax cut, their just-unveiled counterproposal to Democratic Gov. Josh Shapiro's budget plan as each side offers a competing vision for how to use a massive cash surplus sitting in the state treasury. (AP Photo/Alex Brandon, File) (Alex Brandon/AP)

HARRISBURG, Pa. — (AP) — Pennsylvania will join the majority of states that ban motorists from handling a cell phone for almost any purpose while driving, as backers of the legislation hope to reduce distracted driving accidents and deaths after nearly two decades of pressing the measure.

Gov. Josh Shapiro's office said Thursday that the Democrat will sign the bill, 18 years after he first introduced a similar bill when he served in the state House of Representatives. The ban will take effect a year after he signs it, which is expected in the coming days.

The bill also includes a provision long-sought by the Pennsylvania Legislative Black Caucus as a bulwark against racial profiling. That provision requires bigger police departments, as well as the Pennsylvania State Police, to collect and publicly report data on traffic stops, including a driver's race.

The bill passed both chambers of the state Legislature this week and will bring Pennsylvania into alignment with the law on motorists' cell phone use in every one of its neighboring states. Currently, Pennsylvania's restriction on cell phone use while driving applies only to texting.

Sen. Rosemary Brown, R-Monroe, had pushed for more than a decade to toughen Pennsylvania's restriction on cell phone use while driving. Its passage is a “monumental victory” for Pennsylvania that will protect drivers, prevent crashes and save lives, Brown said in a statement.

Under the bill, police can ticket a driver who is handling their phone for almost any reason. Drivers can still use their phone to make phone calls or for other functions, such as listening to music, if they are using it hands-free with technology such as a docking station, Bluetooth or speakers.

The ban applies to motorists sitting in traffic or stopped at a traffic light, but does not include a driver who has parked on the side of the road or another place where the vehicle can remain stopped safely.

Other exceptions include for navigational use or alerting emergency responders. A first offense is punishable by a $50 fine and offenders who cause serious accidents could get more time in prison.

Shapiro called the bill “common sense.”

“I’ve met too many families that have an empty seat at the dinner table because of distracted driving. I’ve met too many people with injuries that they’re going to live with for the rest of their lives because they were hit by a distracted motorist,” Shapiro told WILK-FM radio in Pittston during an interview last month.

Crashes where a distracted driver was a contributing factor are down in Pennsylvania in the past decade, as crashes overall have declined, according to state data.

In some years, it was the second-leading cause of accidents. In 2022, it was the third-leading cause. That was behind speed and improper turning, but ahead of drinking alcohol, careless passing and tailgating.

Twenty-eight states already ban cell phone use while driving, according information from the National Conference of State Legislatures.

Meanwhile, at least 23 states have laws on collecting data on traffic stops, the group said.

Rep. Napoleon Nelson, D-Montgomery, the chair of the Pennsylvania Legislative Black Caucus, said caucus members were concerned that police could abuse a broad new power to pull over motorists and target racial minorities.

Collecting traffic stop data is important for accountability, Nelson said.

“I think this will be a significant win for transparency and help to continue building trust between community members and those who are sworn to serve and protect,” Nelson said in an interview.

Rep. Donna Bullock, D-Philadelphia, who worked for several years to get the provision into law, called it a “big step for Pennsylvania.” The Pennsylvania State Police recently began voluntarily collecting and reporting traffic stop data and some municipal police departments do as well, Bullock said.

But the methods of individual departments aren't uniform, like they will be under the new law, Bullock said.

Data released last year by the state police and analyzed by the National Policing Institute showed no disparities between racial and ethnic groups for warnings, citations or arrests. But troopers were more than twice more likely to search Black and Hispanic drivers than white drivers, the report showed.

Under the forthcoming law, data that police must report includes the reason for the stop, details from a search of the vehicle and the race, ethnicity, age and gender of the driver who was stopped. Police forces that serve municipalities under 5,000 people are exempt from the requirement.

The data collection requirement takes effect in a year and a half. After the cell phone ban takes effect, drivers get a grace period of another year in which they only receive a written warning for violating it.

Follow Marc Levy at twitter.com/timelywriter .

Copyright 2024 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed without permission.

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Tesla’s Autopilot caused a fiery crash into a tree, killing a Colorado man, lawsuit says

The widow of a man who died after his Tesla veered off the road while he was using its partially automated driving system is suing the carmaker

DENVER -- The widow of a man who died after his Tesla veered off the road and crashed into a tree while he was using its partially automated driving system is suing the carmaker, claiming its marketing of the technology is dangerously misleading.

The Autopilot system prevented Hans Von Ohain from being able to keep his Model 3 Tesla on a Colorado road in 2022, according to the lawsuit filed by Nora Bass in state court on May 3. Von Ohain died after the car hit a tree and burst into flames, but a passenger was able to escape, the suit says.

Von Ohain was intoxicated at the time of the crash, according to a Colorado State Patrol report.

The Associated Press sent an email to Tesla's communications department seeking comment Friday.

Tesla offers two partially automated systems, Autopilot and a more sophisticated “Full Self Driving,” but the company says neither can drive itself, despite their names.

The lawsuit, which was also filed on behalf of the only child of Von Ohain and Bass, alleges that Tesla, facing financial pressures, released its Autopilot system before it was ready to be used in the real world. It also claims the company has had a “reckless disregard for consumer safety and truth," citing a 2016 promotional video.

“By showcasing a Tesla vehicle navigating traffic without any hands on the steering wheel, Tesla irresponsibly misled consumers into believing that their vehicles possessed capabilities far beyond reality,” it said of the video.

Last month, Tesla paid an undisclosed amount of money to settle a separate lawsuit that made similar claims, brought by the family of a Silicon Valley engineer who died in a 2018 crash while using Autopilot. Walter Huang's Model X veered out of its lane and began to accelerate before barreling into a concrete barrier located at an intersection on a busy highway in Mountain View, California.

Evidence indicated that Huang was playing a video game on his iPhone when he crashed into the barrier on March 23, 2018. But his family claimed Autopilot was promoted in a way that caused vehicle owners to believe they didn’t have to remain vigilant while they were behind the wheel.

U.S. auto safety regulators pressured Tesla into recalling more than 2 million vehicles in December to fix a defective system that’s supposed to make sure drivers pay attention when using Autopilot.

In a letter to Tesla posted on the agency’s website this week, U.S. National Highway Traffic Safety Administration investigators wrote that they could not find any difference in the warning software issued after the recall and the software that existed before it. The agency says Tesla has reported 20 more crashes involving Autopilot since the recall.

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