P0571 GMC Code - Cruise Control Brake Switch Circuit
Quick Answer
The Engine Control Module (ECM) monitors the Brake Pedal Position Sensor. Common causes include Faulty Brake Pedal Position Sensor, Misadjusted Brake Pedal Position Sensor, Brake Pedal Position Sensor harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0571 GMC indicates Cruise Control Brake Switch Circuit.
- Common causes
- Common causes include Faulty Brake Pedal Position Sensor, Misadjusted Brake Pedal Position Sensor, Brake Pedal Position Sensor harness is open or shorted.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0571 GMC Description
This diagnostic test functions on the assumption that a sudden decrease in vehicle speed is caused by a brake pedal application. When the ECM detects that there is a 4.2 km/h (2.6 mph) or greater decrease in vehicle speed within 0.25 seconds without a transition of the stop lamp switch, the ECM sets Diagnostic Trouble Code (DTC) P0571.
The DTC will be set when the BCM detects either a low voltage signal on the stop lamp switch signal circuit when the serial data message from the ECM indicates the brakes are applied or a high voltage signal on the stop lamp switch signal circuit when the serial data message from the ECM indicates the brakes are not applied.
What are the Possible Causes of the DTC P0571 GMC?
- Faulty Brake Pedal Position Sensor
- Misadjusted Brake Pedal Position Sensor
- Brake Pedal Position Sensor harness is open or shorted
- Brake Pedal Position Sensor circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC P0571 GMC?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0571 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P0571 GMC code?
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Information for Specific GMC Models
- P0571 2014 GMC Sierra — Cruise Control Brake Switch Circuit
- P0571 2015 GMC Sierra — Cruise Control Brake Switch Circuit
- P0571 2016 GMC Sierra — Cruise Control Brake Switch Circuit
- P0571 2017 GMC Sierra — Cruise Control Brake Switch Circuit
- P0571 2018 GMC Sierra — Cruise Control Brake Switch Circuit
Frequently Asked Questions about P0571 GMC Code
1. What are the common symptoms of OBDII code P0571 GMC?
The common symptoms of code P0571 GMC include the cruise control not working, the brake lights staying on all the time, and the inability to shift out of park.
2. What can cause OBDII code P0571 GMC to trigger?
The most common cause of code P0571 GMC is a faulty cruise control brake switch or a malfunction in the cruise control brake switch circuit.
3. How can I diagnose the issue related to code P0571 GMC?
To diagnose code P0571 GMC, you can start by checking the cruise control brake switch for proper functionality, inspecting the wiring and connectors for any damage, and using a scan tool to retrieve the trouble codes.
4. Can I still drive my vehicle with OBDII code P0571 GMC?
While you may still be able to drive your vehicle with code P0571 GMC, it is recommended to address the issue promptly to avoid potential safety hazards or further damage to the vehicle.
5. How can I repair OBDII code P0571 GMC?
Repairing code P0571 GMC typically involves replacing the faulty cruise control brake switch or repairing any damaged wiring or connectors in the cruise control brake switch circuit.
6. Can a DIY enthusiast fix OBDII code P0571 GMC?
Yes, a DIY enthusiast with some knowledge of automotive systems and access to basic tools can potentially fix code P0571 GMC by following repair guides or consulting with a professional for assistance.
7. Will resetting the check engine light resolve code P0571 GMC?
Resetting the check engine light may temporarily clear the code, but it will not fix the underlying issue causing code P0571 GMC. It's important to diagnose and repair the problem to prevent the code from reoccurring.
8. How long does it typically take to repair OBDII code P0571 GMC?
The repair time for code P0571 GMC can vary depending on the extent of the issue and the expertise of the individual performing the repair. In general, it may take anywhere from 30 minutes to a few hours to complete the repair.
9. Are there any preventive measures to avoid OBDII code P0571 GMC in the future?
Regularly inspecting the cruise control brake switch, maintaining proper electrical connections, and addressing any issues promptly can help prevent OBDII code P0571 GMC from occurring in the future.
10. Can OBDII code P0571 GMC affect the overall performance of the vehicle?
While code P0571 GMC is primarily related to the cruise control brake switch circuit, ignoring the issue can potentially affect the overall performance of the vehicle, especially in terms of safety and convenience features.
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