cruise control switch circuit

[SOLVED] P0571 Code: Fix Cruise Control Brake Switch Circuit For Smooth Rides!

The automobile fault code P0571 indicates a problem with the Brake Pedal Position Sensor.

This can cause the engine light to turn on, the stop light to become inoperative, and the cruise control system to stop working.

The possible causes include a faulty sensor, a misadjusted sensor, an open or shorted sensor harness, or a poor electrical connection. To fix this issue, you should visually inspect the wiring harness and connectors for any damage.

Look for broken, bent, pushed out, or corroded pins on the connectors. The repair time for this problem is estimated to be around 1.0 hour.

Unlocking The Mystery: Understanding The Symptoms Of Code P0571

If you’re experiencing an illuminated engine light, inoperative stop light, and non-functioning cruise control, you may be dealing with the p0571 fault code.

• The symptoms of the automobile fault code p0571 include: Engine Light ON (or Service Engine Soon Warning Light), stop light inoperative, and cruise control system inoperative.

Unraveling The Mystery: What Causes Fault Code P0571?

The automobile fault code p0571 can be caused by a faulty brake pedal position sensor, misadjusted sensor, open or shorted harness, poor electrical connection, or a faulty body control module (BCM).

• The fault code p0571 can be caused by a faulty brake pedal position sensor, a misadjusted brake pedal position sensor, an open or shorted brake pedal position sensor harness, a poor electrical connection in the brake pedal position sensor circuit, or a faulty body control module (BCM).

Fixing Code P0571: A Step-By-Step Guide To Resolve The Issue

To fix the p0571 fault code, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

• To fix the automobile fault code p0571, start by checking the possible causes mentioned above.
• Then, visually inspect the wiring harness and connectors related to the issue.
• Look for any damaged components and check if there are any broken, bent, pushed out, or corroded pins in the connectors.
• This fix typically takes around 1.0 hour to complete.

Cracking The Code: P0571 – Cost And Complexity Unveiled!

The factors influencing the diagnosis and fixing cost of the automobile fault code p0571 are the estimated repair time and the hourly rate charged by auto repair shops. The estimated repair time for this fault code is 1.0 hour. Auto repair shops typically charge between $75 and $150 per hour for their services.

These factors will determine the overall cost of diagnosing and fixing the p0571 fault code.

P0571 Fault Code: Understanding The Brake Switch Circuit Malfunction

The P0571 fault code is related to the Brake Pedal Position Sensor in your vehicle. The Engine Control Module (ECM) monitors this sensor to detect when the brake pedal is applied.

It does this by detecting a specific voltage signal. When the ECM detects a sudden decrease in vehicle speed without the brake pedal being applied, it sets the P0571 code.

This code is triggered when there is a 4.2 kmh (2.6 mph) or greater decrease in vehicle speed within 0.25 seconds, and the stop lamp switch does not transition.

The P0571 code can be set for two reasons. The first is when the Body Control Module (BCM) detects a low voltage signal on the stop lamp switch signal circuit, even though the ECM indicates that the brakes are applied. The second reason is when the BCM detects a high voltage signal on the stop lamp switch signal circuit, even though the ECM indicates that the brakes are not applied.

If you are experiencing the P0571 fault code, it is important to have your vehicle inspected and repaired by a qualified technician. They will be able to diagnose the exact cause of the code and perform the necessary repairs to ensure your vehicle is safe and functioning properly.

If you’re experiencing the symptoms of the automobile fault code P0571, you may notice that your engine light is on or that the service engine soon warning light is illuminated. Additionally, your stop light may not be working properly, and your cruise control system may be inoperative. These issues can be caused by a faulty brake pedal position sensor, a misadjusted sensor, an open or shorted sensor harness, a poor electrical connection in the sensor circuit, or a faulty body control module. To fix the problem, you should visually inspect the wiring harness and connectors, checking for any damage or corrosion. It’s also important to look for broken, bent, pushed out, or corroded pins in the connectors.

If you’re experiencing the p0571 fault code, you may notice that your engine light is on, your stop light isn’t working, and your cruise control system is inoperative. This could be due to a faulty brake pedal position sensor, a misadjusted sensor, an open or shorted sensor harness, a poor electrical connection in the sensor circuit, or even a faulty body control module. To fix this issue, visually inspect the wiring harness and connectors, checking for any damage or corrosion. Also, look out for broken, bent, pushed out, or corroded pins in the connectors.

If you’re dealing with the p0571 fault code in your automobile, you may notice the engine light or service engine soon warning light is on, the stop light is inoperative, and the cruise control system is not working. This issue is typically caused by a faulty brake pedal position sensor, a misadjusted sensor, an open or shorted sensor harness, a poor electrical connection in the sensor circuit, or a faulty body control module (BCM). To fix this problem, start by visually inspecting the wiring harness and connectors, checking for any damage or broken pins.

If you’re experiencing an engine light on, a non-functioning stop light, or an inoperative cruise control system, the p0571 fault code may be the culprit. This code is typically caused by a faulty or misadjusted brake pedal position sensor, an open or shorted sensor harness, poor electrical connections, or a faulty body control module. To fix the issue, visually inspect the wiring harness and connectors, check for damaged components, and look for any broken, bent, pushed out, or corroded connector pins.

P0571: Cruise Control / Brake Switch A Circuit Malfunction

What does code P0571 mean ? And how do you resolve it ?

In this article, we’ll explain what the P0571 code is , its possible causes , and an easy way to resolve it . 

In This Article:

What is code p0571, what does the p0571 code mean, what can trigger code p0571, symptoms associated with the p0571 code, is code p0571 critical, how is code p0571 resolved, the best way to fix p0571 code issues.

• 5 DTC Code FAQs

Let’s get started.

P0571 is a generic OBD-II diagnostic trouble code (DTC) that the engine control module (ECM) generates. The P0571 code is defined as a “cruise control / brake switch ‘ A’ circuit malfunction.” 

The letter ‘A’ can refer to a specific wiring, harness, connector, and so on . 

Your mechanic would have to look up the vehicle service manual and wiring diagram to know what component is linked to the ‘A.’ 

The P0571 code occurs when the engine control module detects a malfunction in the brake switch circuit and deactivates the cruise control. 

An electrical malfunction usually triggers the P0571 code, but it can be prompted by something as simple as dirt on a connector, even if the rest of the brake switch is working fine. 

Here are some common culprits:

• A fault within the brake switch circuit, like a wiring issue.
• A defective brake switch connector.
• A faulty switch in the cruise control system buttons.
• An internal short or open circuit in the engine control module. 
• A blown fuse (this can be a cause or symptom of the P0571 code).
• Wrong brake light bulb installed.

Next, what kind of symptoms can you expect with a P0571 code?

Here are several symptoms that are associated with a P0571 DTC:

• The check engine light turns on. 
• Erratic cruise control functioning. 
• Some cruise control functions aren’t working correctly (like Set, Acceleration, or Resume).
• The brake light doesn’t work due to problems with the brake light switch assembly.

Some of these symptoms may not only be related to the cruise control or brake switch. 

For example, a glowing check engine light can imply different problems, ranging from a lean fuel mix to ABS issues . 

That’s why it’s essential to get a professional opinion from a mechanic and have your stop lamp switch problem resolved correctly. 

Not by itself. The P0571 error code only indicates minor issues and rarely creates driveability problems. At its worst, your vehicle cruise control simply won’t work. 

But, the P0571 code may turn up alongside other codes that indicate more serious problems with the brake pedal, brake switch, or cruise control system. The P0571 can also turn up with codes like the P1630 DTC, which is related to the skid control ECU, or the P0503 DTC, which concerns the vehicle speed sensor . 

Problems with these units can lead to bigger road safety issues.

Your mechanic will review every error code present with an OBD-II scanner, including those on the freeze frame data. They’ll then clear the code and take your car for a test drive to see if the code returns. 

If the code does return, your mechanic will need to investigate further. They’ll measure the voltage on each fuse or circuit to pinpoint the issue. 

Once they’ve located the problem, your mechanic will repair or replace the faulty component, connector, or wiring. They’ll then reset the engine trouble code and take the vehicle for another test drive.

But what’s the best way to get all of this fixed?

It’s a good idea to always get an experienced mechanic to diagnose your P0571 code and fix the issues associated with it. 

When looking for a mechanic to deal with your P0571 code, make sure that that they:

• Are certified.
• Use only high-quality replacement parts and tools.
• Offer a service warranty.

Luckily for you, AutoNation Mobile Service ticks all those boxes. 

AutoNation Mobile Service is a convenient mobile vehicle repair and maintenance solution, and here’s why you should go to them for a P0571 DTC diagnosis:

• Any error code diagnoses and fixes can be performed right in your driveway.
• Online booking is convenient and easy
• Competitive, upfront pricing
• Expert technicians perform the vehicle inspection and servicing
• All repairs and maintenance are done with high-quality equipment and replacement parts
• AutoNation Mobile Service provides a 12-month | 12,000-mile warranty for all repairs

How much can you expect it to cost?

Depending on location, AutoNation Mobile Service typically charges between $95-$150 for a diagnosis. If you decide to follow through with the repair, the diagnosis fee will be applied to the final cost of the repair. 

The cost to replace your brake light switch can range anywhere from $50-$160. The total price depends on a few different factors, including your location, make and model of your vehicle, and even your engine type.

Now that we’ve gone over the basics of code P0571, let’s cover some FAQs:

5 FAQs About Diagnostic Codes

Here are the answers to some additional questions you may have:

1. What’s a DTC?

The diagnostic trouble code (DTC) is a code generated by a vehicle’s onboard diagnostics (OBD) system to identify vehicle malfunctions. 

2. What’s The ECM?

The engine control module (ECM), also known as the powertrain control module (PCM), monitors and controls all sorts of sensors and switches related to the engine functionality of your vehicle. This includes the cruise control function that manages vehicle speed or the skid control ECU that manages traction.

3. What Is A Generic Trouble Code?

“Generic” means that the trouble code will indicate the same issue across different OBD-II vehicles regardless of make. 

4. What Is The Brake Switch?

The brake switch is connected to the brake pedal and is responsible for deactivating the cruise control system and also controls the brake light. 

The brake switch is also known as the:

• Brake light switch
• Stop light switch
• Stop lamp switch
• Brake release switch

5. How Does The Brake Switch Circuit Work?

The engine control module (powertrain control module) monitors the voltage on the brake switch circuit (stop light signal circuit). 

When you depress the brake pedal, voltage is delivered to the “terminal STP” in the ECM circuit through the stop light switch assembly. This voltage on the “terminal STP” gives a signal to the ECM to cancel the cruise control. 

When you release the brake pedal, the stop light signal circuit is reconnected to the ground circuit. The ECM reads this zero voltage and recognizes that the brake pedal is free.

Final Thoughts On Code P0571

Troubleshooting a DTC can be a complex process, so it’s much easier to get a professional to do it. Having no cruise control may not be a big deal on its own, but you’d want to make sure there aren’t any related issues complicating things. For an easy solution, just contact AutoNation Mobile Service , and expert technicians will be at your door, ready to help in no time!

Recommended Reads

We deliver car repair and great content, sign up to get maintenance tips, news, and promos to help keep your car in tip-top shape..

How to Diagnose Cruise Control Problems

Technically Speaking: The Need for Speed Under Control

James Berry Writer Apr 24, 2015

See All 7 Photos

Q: Hi James. I'm so happy to have the tech column in Vette. It has helped me so many times. I'm in need of some advice on my cruise control. It was working fine until I replaced the battery terminal ends due to corrosion. I love driving my Corvette on the open road when the weather is nice and I use the cruise control to keep out of trouble if you know what I mean. Is there any way I can diagnose the problem myself?

Thanks for your help,

A:Hi Chris, and yes, you can diagnose this problem yourself. I have had a lot of questions on how to diagnose and repair cruise control for all different generations of the Corvette. Since you did not include the year of your car we will discuss how to diagnose and check the components that will cover most of the cruise controls on the earlier generations of the Corvette.

The easiest way to diagnose would be by using a scanner. If you don't happen to have one of those there is an "old-school way" to figure out your problem. It is very common to have cruise control issues after changing a battery because the movement of sliding the battery in and out of the tray can cause the vacuum lines of the cruise control servo to dislodge or break. Since you only replaced the terminal ends, and assuming there wasn't much movement of the battery, we will have to go old-school and start from what I call the "jumping off point." Basically, we have to begin somewhere so let's start at the most common element, the cruise control servo.

Examine the vacuum lines to ensure that they are intact and not leaking. The photo at the beginning of the article shows the most common failure of cruise control systems, vacuum hoses that are leaking or deteriorated to the point they will not stay attached to the cruise control servo. If you don't find any problem there we will need to search a little deeper. Since we jumped off at the most common failure—vacuum lines—let's back up and test the fuses with a test light. I always recommend testing all of the fuses at this time, not just the ones related to cruise control. Sometimes you will find fuses feed multiple components that may not have been listed in the owner's manual.

First, turn the key to the On position. Probe the back side of each fuse. There are two places on the back side of each fuse to probe; if the test light does not light on both sides of the fuse you will find that the fuse is most likely blown. If the test light does not light on either side of the fuse; you will need to look in the owner's manual to see what that circuit feeds. Certain circuits will require that you activate something to illuminate the test light, such as turning the headlamp switch on to energize that particular fuse. If all of your fuses check good we will continue down our pathway of the cruise control system.

Our next step would be to make sure the servo operates freely. The cruise control system operates a mechanical linkage to the throttle body by using a vacuum motor called the cruise servo. This servo has a diaphragm that is moved when vacuum is applied to one side. There are two solenoids located inside of the servo. One solenoid connects the vacuum motor to the vacuum tank and allows for more throttle position. The other solenoid vents the vacuum to reduce throttle position.

While squeezing the diaphragm with your hand, you can watch the throttle open and close, and the cable should move freely with no binding or tight spots. If you see any restrictions or binding, we know the cable or its attachment point is the culprit. If all is working properly our quest continues.

There are two hoses going into the cruise servo, the smaller hose is a vacuum supply and the larger hose is the dump hose. First, check the vacuum supply hose using a vacuum gauge. It should read between 15-20 inches of vacuum at idle. If not, check the supply hose for a leak. This hose originates from the intake manifold.

Feeding just off of the intake manifold you will find a solid black or a black and white vacuum check valve with two or three ports. This is a one-way check valve that prevents loss of vacuum to the air-conditioning controls and cruise servo when the manifold vacuum drops under acceleration.

To test the check valve, remove the valve from the hose and apply vacuum on the port closest to the intake. It should not hold the vacuum applied. Next, apply vacuum to one of the smaller ports and cover the other small port with your finger, it should hold vacuum. Remember, vacuum hoses and check valves can deteriorate and become brittle with heat and age. This is a very common problem.

If the vacuum supplied is good then we need to check the operation of the dump hose. Use a vacuum pump to apply vacuum to the dump hose to approximately 15 inches, and then press on the brake pedal. The vacuum should be dumped and the gauge should read 0. If the vacuum is not dumped we will need to check for a pinched vacuum hose or a faulty or out of adjustment brake vacuum-control switch.

If vacuum is getting to the servo and can be dumped, check to see if you are getting power to the servo. While placing your hand on the servo, have someone turn on the ignition and turn the cruise control switch to the On position. You should hear and feel the solenoids in the servo click. This lets you know the switch is working and that you have power to the servo. If you did not hear or feel a click in the servo, you will need to check to see if you are getting voltage to the servo itself. Disconnect the connector at the servo and connect a multimeter—on most systems—between terminals B and D. It should read approximately 8 volts.

If you are not reading 8 volts between terminals B and D—with the key and cruise control in the On position—have someone release the steering tilt arm and move the steering column up and down slowly. If you are reading an intermittent voltage on the multimeter, the wiring from the cruise control engage switch could be broken in the steering column. This is a problem that can be caused from the wires becoming brittle with age. Then, as you use the tilt steering wheel feature the wires naturally bend as the column is tilted, causing the aged wires to break. So, as the tilt column is moved up and down, the frayed wires can make contact at times.

If you think you are having a solenoid problem inside the cruise control servo there is a "no tools required" test you can perform at this point. It is to simply pull the servo vacuum pod and cover the two vacuum ports with one finger, then push another finger against the dump servo plunger. As long as your finger is on the dump servo plunger the diaphragm should hold until you remove your finger. If the diaphragm will not hold, there is an internal leak in the servo or the diaphragm and the servo will need to be replaced, unless the plunger and a pin inside of the dump servo are stuck.

Make sure they move freely and are not stuck. No problem found? Our trek continues.

Using a multimeter, check the resistance of the solenoids inside of the servo to make sure they are operating properly. The following will work on most C3 and C4 servos. The connector will be labeled A, B, C, D, E. Unplug the connector. Remember, you will need to refer to it for the correct alpha locations at the servo.

1. Check the resistance between pin A and C. It should be somewhere between 30 and 50 ohms.2. Check the resistance between pin C and E. It should be somewhere between 30 and 50 ohms.3. Check the resistance between pin B and D. It should be somewhere between 10 and 30 ohms.

If any of the resistance readings fall out of range, a defective solenoid should be suspected and the servo will have to be replaced.

If all of the above test out OK, check to see if the brake switch is out of adjustment. A quick way to diagnose this is to try holding the brake pedal up with the top of your left foot at the same time as you are engaging the cruise control while on a test drive. If the cruise control tries to set, then the brake switch will most likely need to be adjusted. Adjustment of the brake switch is very common. If your Corvette has a manual transmission you have a clutch switch that has the ability to disengage the Cruise Control. This switch can be tested in the same way as the brake switch. To adjust the brake pedal switch, simply depress the brake pedal fully. Insert the brake pedal switch until it seats on its bracket. You will hear it click as you are inserting it into its bracket. After inserting the switch fully, pull the brake pedal back against its stop, you will hear the switch click into its correct position. Reconnect the brake switch electrical connector and vacuum hose (if equipped). Have someone check your brake lamps for correct operation before you go on a test drive.

If you suspect that the brake switch may be faulty you can use a test light to probe both sides of the switch. If the light only illuminates on one side or the other, or both sides light up, this is OK. (This switch can be a commonly open or commonly closed switch.) Now, depress the brake pedal and perform the same test. You should have the opposite reaction. If one side lit up and the other didn't on the first test, with the pedal depressed both sides should illuminate. If both sides illuminated on the first test but when the pedal is depressed only one side should illuminate. If there was no change at all, then the brake switch should be replaced. If when you began the first test and have no illumination at all, check for a blown fuse or an open circuit between the fuse box and the brake light switch.

OK, we have made it this far, and if your cruise control and speedometer are still not working; the Vehicle Speed Sensor (VSS) could be the problem. The vehicle's speed sensor, which is mounted on the output shaft of the transmission, sends electrical pulses to the computer. These pulses are generated by a magnet spinning past a sensor coil. As you increase the speed of the vehicle, the frequency of the pulses increases. Usually, if this sensor has failed it will leave a fault code 24 in the Engine Control Module (ECM). These codes can be retrieved using a scanner or a simple paper clip.

Good luck, Chris. This completes our journey of the cruise control system. I like to use the phrase "jumping off point" to get to the root of the problem. You have to start somewhere so you pick a place to start and then follow that part from beginning to end or until you find the cause of the problem. It involves multiple steps but it gives you a thorough inspection of all elements of the system you are checking. I hope you find the problem with your cruise control.

Questions?Got a question for our Tech Corner expert? Just jot it down on a paper towel or a lightly soiled shop rag and send it to us at Vette Magazine, Attn: Technically Speaking, 1733 Alton Parkway, Suite 100, Irvine, CA 92606. Alternatively, you can submit your question via the Web, by emailing it to us [email protected]. Be sure to put "Technically Speaking" in the subject line.

MotorTrend Recommended Stories

Remembering Top Fuel Driver Larry Dixon

Marc Gewertz | Apr 29, 2024

The 1960s: A Turbulent Era of Hot Rodding With Unprecedented Growth and Experimentation

Hot Rod Staff | Apr 29, 2024

The 1950s: When HOT ROD Magazine Went From Regional to National

Gray Baskerville | Apr 28, 2024

How the Early Years Set the Tone for the First 40 Years at HOT ROD Magazine

Hot Rod Staff | Apr 27, 2024

How To Fabricate Steel Fender Flares for Your Project Car

Steven Rupp | Apr 26, 2024

Mopar Muscle Car Takeover: Dodges, Plymouths, Chryslers, DeSotos, and AMCs Rule Los Angeles!

Johnny Hunkins | Apr 26, 2024

"Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth." - Sherlock Holmes

P0571 – Cruise/brake switch A -circuit malfunction

We recommend Torque Pro

Table of Contents

What does code p0571 mean, what are the common causes of code p0571 , what are the symptoms of code p0571 , how do you troubleshoot code p0571 , codes related to p0571.

• Get Help with P0571

OBD II fault code P0571 is a generic code that is universally defined as “Cruise/brake switch “A” -circuit malfunction”, and is set when the PCM (Powertrain Control Module) detects an abnormally high / low resistance or voltage in the cruise control/brake switch circuit(s). Note however that the way circuits/switches/sensors are labelled vary between applications and manufacturers. For this reason, it is recommended that the manual for the affected application be consulted for details on exactly which circuit is labelled “A” on the cruise control system.

While we need not delve into the complexities of modern cruise control systems here, it should be noted that code P0571 is not concerned with faults in the parts / components and subsystems that actually regulate and control the cruise control system. This code is solely concerned with the circuit that links the brake -, and the cruise control switches both to each other, and to the PCM.

When the PCM detects an abnormal resistance or voltage in this circuit, it will initiate a series of self-diagnostic tests that checks the operation and condition of the entire cruise control system, and if the PCM determines that a condition exists in the brake/cruise control circuit that falls outside of pre-programmed parameters, it will disable the cruise control system if it is activated, which effectively restores control over the vehicles’ speed to the driver.

In terms of operation, once a speed is set via the cruise control switch, the PCM uses input data from several sensors and control modules to maintain the set speed without requiring any inputs from the driver. While design specifics vary between applications, the set speed can be increased /decreased by manipulating various controls on the main cruise control switch, or, the cruise control system can be deactivated by applying a momentary pressure on the brake pedal.

If the fault occurs when the cruise control system is not activated, the PCM will prevent activation of the cruise control system as a protective measure until the problem is resolved. Note however, that on some applications a code will be stored and a warning light be illuminated on the first failure cycle, while on others, up to three failure cycles need to occur before a warning light will be illuminated. In these cases, the code may be present as “pending”.

The image below shows the typical location of the brake / cruise control circuit switch. However, it should be noted that on many applications, the switch that operates the brake / taillights, is incorporated into the brake / cruise control circuit switch, while on many others, the two switches are separate units that are usually colored differently to aid identification. It should also be noted that on many applications with manual transmissions, the brake / cruise control circuit switch might be located on the clutch pedal.

Common causes of code P0571 could include the following-

• Damaged, burnt, shorted, disconnected, or corroded wiring and/or connectors. Note that liquid spills on the steering wheel often cause short circuits in the cruise control and other switches located in the steering wheel
• Defective brake / cruise control switch
• Blown fuses. Note that blown fuses can be either a cause, or a symptom of P0571
• Failed or failing PCM. Note that this is a rare event, and the fault must be sought elsewhere before any controller is replaced

Common symptoms of code P0571 could include the following-

• Stored trouble code and an illuminated warning light. Note however that on some applications, warning lights are not illuminated for cruise control related faults, while on others, a warning light may only be triggered after several failure cycles had occurred
• On most applications, the cruise control system will be deactivated by the PCM when this code is present
• Cruise control related fuses might be blown. Note that blown fuses could be either a symptom, or a cause of this code
• Several other cruise control related codes could be present along with P0571
• Note that code P0571 rarely, if ever, produces driveability issues

NOTE: While it is possible to test fused circuits with a digital multimeter, performing this step with a dedicated fuse tester is often the safest way of doing it, since using this type of tester eliminates the possibility of causing accidental short circuits in confined fuse boxes. Refer to the image below for an example of a typical fuse tester that can test both continuity and resistance in a fused circuit. Note that test lights are useless in this context, since they cannot measure resistance.

Record all fault codes present, as well as all available freeze frame data. This information can be of use should an intermittent fault be diagnosed later on.

NOTE: Pay particular attention to any additional codes that may be present. On many applications, several unrelated circuits share a particular fuse, and it could happen that several circuits are disabled when a cruise control related fuse blows. Thus, if any additional codes are present that do not seem to be related to the cruise control system, checking for blown fuses should be the first step in diagnosing code P0571.

Assuming that no additional codes are present, refer to the manual for the application to locate all fuse boxes, and in particular, the fuse(s) that relate to the cruise control system. If any fuses are blown, do NOT replace any without first testing the circuits and switches for short circuits and other problems. Make repairs, or replace wiring as required to ensure that the problem is resolved definitively before replacing blown fuses.

If no fuses are blown, refer to the manual to locate, and identify the brake/cruise control switch. Note that gaining full access to this switch may require partial disassembly of the dashboard, and/or the removal of one or more trim panels. Be sure to follow the directions provided in the manual exactly to prevent causing damage to trim panels or their fasteners.

When the correct switch is fully accessible, inspect the switch itself and its electrical connector for signs of damage. Failure of the switch is a common cause of this code, so even if it appears to be undamaged, remove it from the vehicle for testing as per the instructions provided in the manual.

These switches are usually relatively simple “ON/OFF” switches, and testing one involves nothing more complicated than checking that a current passes through it, and that it interrupts a current when it is acted upon. However, when the switch passes a current, its resistance must conform to a specified value, so replace the switch if its resistance does not agree with the value stated in the manual.

If the switch checks out, perform a thorough visual inspection of all associated, wiring. Look for damaged, burnt, shorted, disconnected, or corroded wiring and/or connectors. Repair or replace wiring as required.

Clear all codes after repairs are complete, and operate the vehicle at some length with the cruise control activated before scanning the system again to see if any codes return. Note however that if the fault is still present, it may not be possible to activate the cruise control system.

If no visible damage to wiring is found, perform resistance, ground connectivity (where applicable), and continuity tests on all associated wiring, but be sure to disconnect all relevant wiring from the PCM to prevent damage to the controller.

Compare all obtained readings with the values stated in the manual, and make repairs, or replace wiring as required to ensure that all electrical values conform to the ranges specified by the manufacturer.

If all electrical values check out, suspect a faulty cruise control switch, rather than a defective PCM. However, if the cruise control switch is located on the steering wheel itself, or if removing/working on the cruise control switch requires even partial disassembly of the steering wheel, take extreme care when attempting to diagnose open or short circuits in the cruise control switch.

The best course of action in these cases is to disable the steering wheel airbag(s) before doing anything since one mistake can accidentally deploy the airbag, which can cause serious personal injury. Refer to the manual for the application for full details on the correct procedure to follow to disable the airbag, but do NOT disconnect the battery unless the manual explicitly states that the battery must be disconnected at this point.

Also, be sure to install an approved memory saving device to keep critical systems powered up when battery power is removed.

Consult the manual on the correct procedure to follow to test the cruise control switch, but be sure to follow the directions EXACTLY in order to obtain accurate and reliable test results. Bear in mind that cruise control switches are NOT repairable, which means that the switch must be replaced if it fails any test at any point during the test procedure.

Reassemble the steering wheel after all tests / repairs are complete, clear all codes, and operate the vehicle at length with the cruise control system activated to see if any codes return. In the event that the code does not return, be sure to reactivate the airbag, and to clear the airbag related codes that may have set when the airbag was deactivated.

If the code does return, suspect either an intermittent fault, or a defective PCM or other control module. If this is suspected, the wiser option is to refer the vehicle to the dealer or other competent repair shop for professional diagnosis and repair, since generic code readers can generally not diagnose defects or programming errors in control modules.

• P0572 – Relates to “Cruise Control/Brake Switch “A” Circuit Low”
• P0573 – Relates to “Cruise Control/Brake Switch “A” Circuit High”

Help Us Help You

Please comment below describing your issue as well as the specifics of your vehicle (make, model, year, miles, and engine). To get a detailed, expedited response from a mechanic, please make a $9.99 donation via the payment button below.

This site uses Akismet to reduce spam. Learn how your comment data is processed .

P0571 and i have changed the switch I delete it and always coming back lights i see in my car is EPC and the light of brain.

In The Garage with CarParts.com

P0581 Code: Cruise Control Multi-Function Input “A” Circuit High

Reviewed by

Contact Center Manager and Technical Reviewer at CarParts.com

Written by CarParts.com Research Team - Updated on October 2nd, 2023

• The P0581 code stands for “Cruise Control Multi-Function Input ‘A’ Circuit High,” which means the powertrain control module detects a fault in a specific circuit within the cruise control system.
• Multi-function/cruise control switch malfunction, wiring or connector issues, and dirt or grime on the cruise control switch are some of the common causes of the P0581 code.
• An illuminated check engine light, illuminated cruise control light, and inoperative cruise control are common symptoms of the P0581 code.

The cruise control system was developed to reduce driver fatigue. It lets you maintain a consistent speed, so it’s extremely useful, especially during long trips. If there’s an issue with this feature, the powertrain control module (PCM) might log a P0581 code.

What Does the P0581 Code Mean?

Diagnostic trouble code (DTC) P0581 stands for “Cruise Control Multi-Function Input ‘A’ Circuit High.”

The code is set when the PCM detects a fault in a specific circuit within the cruise control system. P0581 usually points to a problem in the cruise control switch located on your steering column or dashboard. However, it can vary significantly depending on your vehicle’s make and model.

A control module manages your cruise control system. Code P0581 is triggered when the PCM detects a high electrical value within the “A” cruise control multi-function input circuit.

Note: The definition of code P0581 might be different depending on the vehicle manufacturer. Check the appropriate repair manual or repair database for the exact code definition.

What are the Common Causes of the P0581 Code?

• Multi-function/cruise control switch malfunction
• Wiring or connector issues
• Dirt or grime on the cruise control switch

What are the Common Symptoms of the P0581 Code?

• Illuminated check engine light
• Illuminated cruise control light regardless of position
• Inoperative cruise control
• Cruise control can’t be set to a specific speed

How to Diagnose the P0581 Code

DTC P0581 can be logged on various makes and models. However, this doesn’t mean that there is a universal procedure for diagnosing and repairing this trouble code.

If you’re not familiar with the cruise control system, it might be best to have a mechanic diagnose the problem. But if you’re an experienced automotive DIYer, then you can go ahead and do the job yourself. The video below will give you an idea of what the diagnostic process might involve:

How to Fix the P0581 Code

Fixing the P0581 code can be complicated. So if you’re not an experienced automotive DIYer with in-depth knowledge about the cruise control system, we recommend taking a trip to an auto repair shop to resolve this DTC.

However, if you have the tools and technical know-how to get the job done, you can try and fix the problem yourself. Guides like the ones from Chilton can help you with your repair. You can also get an ALLDATA subscription for vehicle-specific repair steps.

Keep Reading: Related Posts

Share this story

The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. Guided by CarParts.com's thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.

William “Bill” Guzenski has produced hundreds of how-to videos for the automotive community. He’s an ASE Certified Master Automobile Technician, and is affiliated with the Specialty Equipment Market Association (SEMA). He loves attending race events and car shows throughout the country, as well as traveling in his 40-foot motorhome, exploring abandoned mines and ghost towns.

Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication. Read our full disclaimer here.

View all Questions & Answers

">Read more

For The Car Owner

Get Premium Automotive Content

that can help you extend the service life of your car in your inbox.

Thanks for subscribing! You will soon receive the best repair guides & features from CarParts.com in your inbox.

• location_on Address 1301 Ave T, Grand Prairie, TX, 75050
• local_phone Phone number 1-866-529-0412
• email Email Us
• Ignition System
• Braking System
• Exhaust System
• Cooling System
• Transmission
• Warning Lights
• Product Reviews
• Throttle Body Fuel Injection
• Crankshaft Position Sensor Symptoms
• Alternator Wiring Diagrams
• How to Replace a Cabin Air Filter
• How to Diagnose CV Joint Noise
• How Often to Change Your Oil Filter
• Signs of Bad U-Joints
• Dirty Engine Air Filter
• Exhaust System Diagram
• OBD2 Codes 101
• EVs and Hybrids
• Trivia and History
• Automotive World
• Interactive Car Articles
• Web Stories
• Catalytic Converter Theft
• Electric Vehicle Myths
• Team CarParts.com's First Cars
• Editorial Process
• Refer A Friend
• Side Mirror

How to Replace a Cruise Control Clutch Release Switch

$159.17 - $270.75.

Having a fully functional cruise control has quickly evolved from a luxury upgrade to a needed component in today's fast-paced world. Car drivers across the United States utilize the cruise control to save fuel, increase their comfort while driving, and to relax sore joints and muscles during extended road trips. Unfortunately, a faulty cruise control clutch release switch can compromise cruise control engagement in a manually-shifted vehicle.

Once the cruise control system is set, the cruise control clutch release switch disengages the cruise control whenever the clutch pedal is pressed. Since the clutch is responsible for applying power to the vehicle's wheels, manufacturers of vehicles sold in the United States are required to install the following cruise control shut off devices:

The manual shut-off switch located on the instrument cluster on the steering wheel or turn signal indicator

The brake or clutch pedal release switch located on top of both the brake and clutch pedals In cars with automatic transmissions , the brake release switch is used as a secondary shut off device. Cars with manual transmissions that rely on a clutch pedal to shift often have both the brake and clutch pedal release switch.

Common problems with the cruise control clutch release switch include:

The circuit will not open: in this case, when you press the clutch pedal, it will not trigger the automatic shut off system.

The cruise control clutch release switch does not close the circuit: in this case, the pedal's switch is sending a signal to the vehicle's ECM that the switch is active and won't allow the system to set the cruise control. In either case, the switch will need to be replaced.

Part 1 of 3: Check for the symptoms of a bad cruise control clutch switch

Diagnosing the precise cause of problems with any vehicle system significantly reduces the time, money, and resources you need to spend to complete any repair job.

Step 1: Download any error codes . Start by downloading any error codes that are stored inside the vehicle's ECM. On most OBD-II scanners, an error code P-0704 notes that a problem exists with the clutch release switch.

If you don't receive this error code, or don't have a scanner to download error codes, you will need to perform some self-diagnostic inspections to discover the precise component responsible for the system failure.

Step 2: Check for other symptoms . Some of the other symptoms of a bad of faulty cruise control clutch release switch include:

Cruise control will not turn off: If the cruise control does not shut off when you press the brake pedal, a faulty cruise control clutch release switch can be the culprit. A faulty clutch release switch that is closed does not allow the electrical signal to be sent to the cruise control relay that activates the cruise control on the vehicle.

Cruise control does not set: When the cruise control clutch switch is damaged, it does not permit the electrical circuit to complete to the system relay. In this case, the circuit signal is kept open on the switch but is not forwarded to the vehicle's ECM, causing the vehicle's cruise control to malfunction.

Cruise control shuts off automatically while driving: When the cruise control is activated and shuts off without pressing the clutch pedal, a malfunctioning clutch release switch may be responsible.

Part 2 of 3: Replace the cruise control clutch release switch

Materials Needed

• Boxed end wrench or ratchet wrench
• Flat head screwdriver
• Replacement cruise control clutch release switch
• Replacement cruise control clutch release switch clip
• Safety equipment (safety glasses)

Threadlocker

Note : This article provides general instructions for removing a cruise control clutch release switch. The precise steps, location, and type of switch will be unique to the make and model of your vehicle. Make sure to verify specific steps and guidelines with your vehicle’s service manual before proceeding with this process.

Warning : When working with electrical components or any component that has an electrical connection, always disconnect the power to avoid physical harm.

Step 1: Disconnect the vehicle's battery . Locate the vehicle's battery and disconnect the positive and negative battery cables before proceeding.

Step 2: Locate the cruise control clutch release switch . Refer to your vehicle's service manual or contact the vehicle's manufacturer and ask them to send you a schematic for the clutch release switch. In most cases, the switch is located directly on top of the clutch pedal.

The cruise control clutch release switch is either white or black (based on the manufacturer). The switch has a wiring harness attached to a plate or bracket.

Step 3: Remove floor mats from the driver’s side . It's a good idea to remove any floor mats as they can cause discomfort or slip while you're working, leading to an injury.

Step 4: Remove any access panels under the dashboard . Most vehicles have a cover or access panel that keeps all wires and sensors contained and untangled.

If your vehicle has this type of panel, remove it to gain access to the wiring harnesses underneath the vehicle.

Step 5: Disconnect the wiring harness . Disconnect the wiring harness attached to the cruise control clutch release switch. Use a flathead screwdriver to depress a clip that connects the wiring harness to the sensor.

Once you press down on the clip, pull on the wiring harness slowly to remove it from the clutch release switch.

Step 6: Remove the cruise control clutch release switch . Using a boxed end wrench or ratchet wrench, remove the bolt that secures the clutch release switch to the bracket.

After the bolt has been removed, it should be rather easy to remove the clutch release switch. However, there may be a secure clip attached to the back of the clutch switch. To remove this clip, use a flathead screwdriver to pry the clip off the fitting on the bracket carefully. If done correctly, the clutch release switch should "pop" off easily.

• Note : Pay careful attention to the diagram listed above. On most vehicles, there are two safety switches activated by a clutch pedal; the starter safety switch and the cruise control release switch. Make sure you verify the position of the cruise control switch and the starter switch before you proceed further.

Step 7: Install the new clip . Install the new clip on to the new clutch release switch.

• Tip : It is recommended that you purchase new gaskets, clips, and clamps anytime you replace hardware attached to these support systems.

The same thing applies to the clutch release switch. If your vehicle has a clip that helps to secure this switch to the bracket, install the new clip on the new switch. In many cases, the clip is installed on the new clutch release switch already. If not, make sure to secure the clip to the back of the sensor before attempting to reinstall the new unit.

Step 8: Attach the cruise control clutch release switch . Install the new cruise control clutch release switch in the same position as the older clutch switch. This ensures the wiring harness is easily attached and allows the switch to operate correctly. If the clutch release switch had a clip, snap the clip into its fitting on the bracket first.

Step 9: Reattach the bolt . After you've placed the clutch release switch in the proper location and secured the clip, reinstall the bolt that secures the clutch switch to the bracket.

• Tip : It's a good idea to use threadlocker on that bolt so that the brake switch does not become loose. Tighten the bolt to the recommended torque pressure as noted in your vehicle's service manual.

Step 10: Inspect the wiring harness . Sometimes, the wiring harness of the clutch release switch may be the reason for the problem.

Inspect the condition of the wiring harness to verify there are no frays, cuts, or loose wires that impact the operation of the switch. If the harness is damaged, replace it before proceeding.

Step 11: Reattach the wiring harness . Make sure you reattach the wiring harness in the same position as it was earlier. It should "click" into place once it's properly installed.

Step 12: Reattach the control access panel . Reattach the control access panel under the dashboard and make sure it is installed properly.

Step 13: Reconnect the battery cables . Make sure these are properly connected to the right terminals.

Part 3 of 3: Test drive the vehicle

After completing any replacement job, test drive the vehicle and verify that you've fixed the initial problem.

However, before you begin to drive around town, it's important to set up the right type of road test to examine if the repair process was completed correctly. If you were having problems with the cruise control shutting off after a certain period, test the vehicle for at least that same amount of time.

Step 1: Start the vehicle . Let it warm up to operating temperature.

Step 2: Check the error codes . Plug in the diagnostic scanner and download any existing error codes or clear the codes that showed up initially.

Step 3: Drive to a highway . Drive your vehicle to a highway where you can drive smoothly for at least 10 to 15 minutes with the cruise control on.

Step 4: Set your cruise control at 55 or 65 mph . After the cruise control is set, slightly depress the clutch pedal to see if the switch deactivates the cruise control.

Step 5: Reset the cruise control again and drive for 10 to 15 miles . Verify that the cruise control does not shut off automatically.

Replacing the cruise control clutch release switch is a simple process. However, if you are not comfortable with completing the job yourself, get one of YourMechanic’s local ASE certified mechanics to replace the cruise control clutch release switch for you.

Schedule Cruise Control Clutch Release Switch Replacement

The most popular service booked by readers of this article is Cruise Control Clutch Release Switch Replacement. YourMechanic’s technicians bring the dealership to you by performing this job at your home or office 7-days a week between 7AM-9PM. We currently cover over 2,000 cities and have 100k+ 5-star reviews... LEARN MORE

Cruise Control Clutch Release Switch Replacement

Excellent auto repair ratings ..

4.2 Average Rating

YourMechanic Auto Repair

Service Hours

7 AM - 9 PM

7 days a week

Phone Number

Phone Hours

Mon - Fri / 6 AM - 5 PM PST

Sat - Sun / 7 AM - 4 PM PST

We come to you at no extra charge

12-month/12,000-mile warranty

Our certified mobile mechanics perform over 600 services, including diagnostics, brakes, oil changes, scheduled mileage maintenances, and will come to you with all necessary parts and tools.

Experienced Mechanic?

Recent cruise control clutch release switch replacement reviews, excellent rating, rating summary, need help with your car.

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

Related articles

Related questions, browse other content.

• Service in Phoenix, AZ
• Service in Sacramento, CA
• Service in Sunnyvale, CA
• Service in San Jose, CA
• Service in Tampa, FL
• Kia repair estimates
• Hummer repair estimates
• Lincoln repair estimates
• Chrysler repair estimates
• Oldsmobile repair estimates
• Volkswagen Service
• Oldsmobile Service
• Subaru Service
• Genesis Service
• Lincoln Service
• Ford Mustang Maintenance
• Mazda 3 Maintenance
• Ford Ranger Maintenance
• Ford Taurus Maintenance
• Honda Civic Maintenance

Schedule your Cruise Control Clutch Release Switch Replacement today!

191118 Reviews

Price range for all vehicles

Repairs covered by 12-month/12,000-mile warranty

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · [email protected]

Fox News Bets on Comedy, but Not Only for Laughs

By Brian Steinberg

Brian Steinberg

Senior TV Editor

• Fox News Bets on Comedy, but Not Only for Laughs 15 mins ago
• Amid Turmoil, Paramount Global Sees Q1 Lift From Super Bowl, Narrows Loss 18 hours ago
• ‘NFL Today’ Shake-Up at CBS: Matt Ryan Joins as Boomer Esiason, Phil Simms Exit 1 day ago

Jimmy Failla isn’t taking over Fox News Chanel, but he has, at least for one short period in the late afternoon, seized control of a portion of its New York ground-floor facilities.

The space is typically devoted to a space for guests to hang out and a section for hair and makeup, but Failla uses it to get himself revved up to tape “ Fox News Saturday Night ,” a program the network says is devoted less to red-versus-blue rants and more to making people laugh. The hallway leading to his studio was flooded with the sounds of rockabilly and Queen.

Popular on Variety

Failla tries to keep things light. He recently did a bit where he asked college students on Spring Break whether they’d rather get drunk with President Joe Biden or former President Donald Trump. He opened one late-March program by telling jokes to a three-guest panel about everything from Trump trying to sell Bibles to Major League Baseball. While some of his guests are Fox News mainstays, like Sean Hannity or Bill Hemmer, Failla wants to hear from them about lifestyle issues, not their reactions to the headlines of the day.

Jimmy Failla only hosts a weekend hour on the Fox News schedule, but he plays a more important role at the Fox Corp.-backed outlet than might initially be apparent. Fox News continues to devote the bulk of its primetime schedule to partisan opinion programs that veer from conservative to hard right, but the network is also trying to make room for – of all things – a few laughs.

More interesting, perhaps: Both “Gutfeld” and “Fox News Saturday Night” replaced programs that were among the most hard-right at the network. Gutfeld now occupies a 10 p.m. hour that was previously home to Laura Ingraham, who now holds forth at 7. Failla’s show plays in a slot once led by Dan Bongino.

Fox News executives struck upon comedy as they examined past viewership patterns, says says Megan Albano, the Fox News executive vice president who oversees program development, trying to determine where Fox News viewers went when they weren’t watching Fox News. “There was this very clear appetite for some of the other platforms doing a lot of comedy specials,” she says, “We figured, ‘let’s try it.’” The company has also stocked up on lifestyle programs, documentaries and faith-based concepts.

Others seem to have noticed. CNN in March began running re-airs of Bill Maher’s “Real Time ” – a mix of comedy and chatter about the headlines that has long been reserved for HBO – on Saturday evenings. On Max, the streaming hub owned by CNN parent Warner Bros. Discovery, a section for live-streaming CNN also contains on-demand options from both Maher and HBO colleague John Oliver, whose “Last Week Tonight” has taken news-based comedy well beyond the usual monologues of late night.

Adding comedy to the mix may lure audiences of the future as well as the present. “The audience for pure news is shrinking, and so networks like Fox and CNN have to sort of expand their brands a little bit,” says Nick Marx, a Colorado State University associate professor who is the author of the 2022 book “That’s Not Funny: How the Right Makes Comedy Work For Them.” While the power of the sitcom has diminished in recent years as viewers turns to binge-watching dramatic procedurals, comedy, he says, “is one of the few things that young people tune in to watch,” as demonstrated by the rise of stand-up comedy on venues ranging from Netflix to TikTok.

Fox News’ subscriber base is seen falling to 64.6 million in 2024, according to data from Kagan, a market-research unit of S&P Global Intelligence – a 5.8% dip from 68.6 million last year. MSNBC’s subscriber base is projected to fall 4.4% to 65.5 million, down from 68.5 million. And CNN’s is expected to dip 5.6% to 66.3 million, compared with 70.3 million in 2023.

With those projected declines could come tumbles in the amount to fees the networks can collect from cable and satellite distributors and new pressure to win ad dollars. Kagan sees ad revenue for all three cable-news outlets rising in 2024, in tandem with the bigger audiences they tend to attract in the run up to a presidential election.

If Fox News’ success with comedy continues, Marx adds, “left leaning cable networks showing this type of stuff can’t be far off.”

Comedy could help solve some of the news outlets’ ongoing issues with advertisers. Madison Avenue’s antipathy to single-host opinion programs has become more pronounced in recent years, with a significant chunk of the traditional TV clientele growing more wary of putting their commercials in a program that has the potential to spark outrage among some portion of viewers, or those who hear about an offending remark via social media. Comedy, however, wraps opinion in humor, and may prove more acceptable.

“People want to be informed. They also want to be entertained,” says Albano of the move to add comedic stylings to Fox News’ later hours. “After they get their news and analysis for the day, they have this little reprieve from the weight of their days. They just get to laugh.”

Failla was discovered while doing his routine at New York’s Gotham Comedy Club and, while he may be new to some Fox News audiences, his career has developed methodically. He first was enlisted to help write for Kennedy, the former MTV veejay who had a show on Fox Business Network. The first time Failla made an on-camera appearance, he was still driving the cab, and left his vehicle parked on Manhattan’s Sixth Avenue near the Fox building. ‘The trunk was open, one door was open, the hazards were on,” he recalls., “Why? That’s how you get out of a parking ticket. It makes the cop think you’re coming back with something heavy.”

Eventually, he did: His own show.

On Saturdays, Failla says, he knows the audience has been watching, talking and tweeting all week and just wants to let go. “We are not a call to arms show. We are like a chill the f—k out show.” He writes his own jokes and sketches, and takes great delight in a letter he received from NBC’s Jimmy Fallon congratulating him on launching the Fox News series, as well as a cooler filled with Ben & Jerry’s “Tonight Dough” ice cream. Failla, who met his wife on the road while doing stand up in Cleveland, says she originally believed she was going to see Fallon perform.

He’d love to get Fallon or Stephen Colbert on the Fox News program, he says, but would be even more excited to land David Letterman or Jay Leno. Their era in wee-hours TV, he says, “was probably the golden age of late night. It was pure escapism. My frustration now is that late-night has gotten a little more partisan.”

Meanwhile, Failla has started to make appearances elsewhere on the Fox News schedule. He fills in for Gutfeld on his weekday program. And he was spotted this past Saturday night leading the network’s coverage of the annual White House Correspondents Dinner – even interviewing NBC News’ Lester Holt and Savannah Guthrie during one segment.

While Failla and Gutfeld probably shouldn’t be on air when news of serious import breaks – and have been pre-empted for coverage of such – they offer viewers pure comfort food, says Albano. “They don’t take themselves too seriously, which I think the audience appreciates.”

More From Our Brands

Alice cooper once tossed a chicken into an audience. a new doc captures the mayhem, ask robb: i’m a hardcore yachtie who loves privacy. should i really take a cruise, legends picked by nycfc to lead premium sales for soccer stadium, be tough on dirt but gentle on your body with the best soaps for sensitive skin, tony award nominations 2024: the complete list, verify it's you, please log in.