P0571 2017 GMC Sierra 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 2017 GMC Sierra 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 2017 GMC Sierra 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 2017 GMC Sierra?
- 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 2017 GMC Sierra?
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 2017 GMC Sierra 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.
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Frequently Asked Questions about P0571 2017 GMC Sierra Code
1. What does the OBDII code P0571 mean on a 2017 GMC Sierra?
P0571 indicates an issue with the Cruise Control Brake Switch Circuit, which means the vehicle's computer is not detecting proper signals from the brake switch when the brake pedal is pressed.
2. What are the symptoms of code P0571 in a 2017 GMC Sierra?
Common symptoms include the cruise control not functioning, the brake lights not operating properly, and possible warning lights on the dashboard.
3. What causes the P0571 code on a 2017 GMC Sierra?
The most common causes are a faulty brake switch, corroded or damaged wiring, a blown fuse, or a malfunctioning cruise control module.
4. Can I drive my 2017 GMC Sierra with the P0571 code?
While the vehicle may still be drivable, it is not recommended as the brake lights or cruise control could malfunction, posing a safety risk.
5. How do I fix the P0571 code on a 2017 GMC Sierra?
Start by inspecting and replacing the brake switch if necessary, checking the wiring and connectors for damage, and ensuring all fuses related to the brake system are intact.
6. How much does it cost to fix the P0571 code on a 2017 GMC Sierra?
Repair costs can range from $50 to $200, depending on whether the issue is a simple brake switch replacement or requires more extensive electrical repairs.
7. How do I test the brake switch for a P0571 code on my 2017 GMC Sierra?
Use a multimeter to check for proper voltage and continuity at the brake switch. If the switch does not respond correctly, it may need replacement.
8. Will clearing the code P0571 fix the issue on my 2017 GMC Sierra?
Clearing the code may turn off the warning light temporarily, but it will not solve the underlying problem. Proper diagnosis and repair are necessary.
9. Can a faulty brake light bulb cause the P0571 code on a 2017 GMC Sierra?
While uncommon, issues with the brake light circuit, including faulty bulbs or wiring, can sometimes contribute to the P0571 code.
10. Is a professional mechanic required to fix the P0571 code on a 2017 GMC Sierra?
If you're comfortable with basic electrical diagnostics and repairs, you can attempt to fix it yourself. However, consulting a professional mechanic is recommended for accurate diagnosis and repair.
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