Error Code P0571: What It Means & What To Do?

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The error code P0571 code would identify a problem with the switch that deactivates the cruise control when the brake pedal is pressed.

The trouble code P0571 can be defined as Cruise Control/Brake Switch A Circuit Malfunction.

The P0571 trouble code would start triggering up when there is an issue with the switch which is connected to the brake pedal that deactivates the cruise control system in the vehicle. If the switch is not functioning properly, then the cruise control might not operate properly.

What causes this problem with the Cruise Control/Brake Switch A Circuit Malfunction?

• There can be some wiring issues like pinched on brake pedal, chafed, etc
• The engine control module might have some defects
• Faults in the cruise control or brake switch
• Debris/dirt might be mechanically hindering brake switch operation
• Brake switch might not be adjusted properly
• Issues with the brake switch

1. Engine Control Module - A faulty Engine Control Module can be troublesome. You can always rely on us as we have best auto parts for our customers.
2. Cruise Control Switch - If everything is alright with PCM, then there is surely some defect in Cruise Control Switch. Get it replaced before the situation gets worse.
3. Fuel Injector - P0571 code can display due to some issues in the Fuel Injector. So, it is very important to replace the Fuel Injector with us at equitable prices.
4. Powertrain Control Module - Do you remember when was the last time you got your car Powertrain Control Module checked up? A defective Powertrain Control Module can cause a lot of issues like displaying P0571 code.
5. Fuel Injection Harness - Are there some faults in your Fuel Injection Harness? Don’t waste time and get them replaced or else P0571 code can turn up.

There could be countless symptoms which that would accompany with this fault code. Willing to know some common symptoms of OBD Trouble Code P0571? Your wish is our demand. Have a look at them below:

Common Symptoms

• There can be certain functions which are not operating as they should (e.g. set, resume, accel., etc.)
• Cruise control turning on but not engaging
• No brake lights if the brake light switch is defective
• Inoperative cruise control
• The cruise control operation might be erratic

Looking out for some ways with the help of which you can correct this fault code? Then you have arrived at the correct place. We are here to help you out, so you must check out the steps mentioned below as follows:

• Carefully inspect the electrical components and connections for signs of damage or wear
• Repair or replace any wires or connections that do not appear to be in good working order
• Once the wiring is all in good shape, the mechanic will inspect the brake pedal and brake switch
• If there are any parts that need replacing, the mechanic will do so before resetting the code and test driving the vehicle to see if the code returns
• Now if the code does return, then the culprit may be the controls for the cruise control system which is located in the vehicle
• Check the controls for the cruise control system and anything that isn’t in working order will be repaired or replaced

Don’t get tensed if you are still facing any of these issues as we care for our customers and that’s why we offer a good range of engine light flashing, ratchet straps, tie down straps, body control module, blown fuse, battery connectors and a lot more. We are sure that now all your issues would be resolved.

The advanced diagnostic steps become very vehicle specific and may require the appropriate advanced equipment and knowledge to perform accurately. We include basic steps below but refer to a vehicle year/make/model/powertrain specific repair guide for specific steps for your vehicle.

First of all, you must peek under the dash and take a look at the brake switch right away. It is usually mounted to the brake pedal arm itself. Many at times it has been seen that the driver's foot breaks the switch completely off its mount so, if it's not mounted properly or it is completely broken, you will be able to tell immediately and potentially save yourself some time and shop fees

So, if this is the case, then you should replace the cruise control/brake switch with a new one. Make sure to follow manufacturer specific brake switch installing and adjusting procedures to avoid damaging the sensor or even causing more problems

The circuit which is involved should be verified properly. Refer to a wiring diagram in your service manual to determine the colour codes and designation for the cruise control/brake switch A circuit. A lot of times, to rule out the possibility of the fault being present in the harness itself, you can disconnect one end from the brake switch and the other from the ECM. You can perform a lot of tests using a multimeter. One common test is a continuity test. Manufacturer provided specifications are needed to compare the actual values to the desired ones. Generally speaking, you will be checking the resistance of the particular circuit to determine any opens, high resistance, etc present. If you are performing this test, it would be a good idea to inspect the pins in the connectors, switch, and ECM. Sometimes moisture can creep through and cause intermittent connections. If there is corrosion present, use electrical connection cleaner to remove before reconnecting everything

Take a look at your engine control module. It is important to note, sometimes with cruise control, it is the BCM (body control module) that monitors and adjusts this system. Pinpoint which one your system uses and physically inspect for any water intrusion

Common Mistakes When Diagnosing The P0571 Code

• Generally, the P0571 trouble code would be triggered up because of an electrical issue, so it is very important to keep in mind the fuses or the buttons on the dashboard that control the cruise control system
• Issues with these components can give rise to the P0571 trouble code even when brake switch is in perfect working condition