What does P0571 mean?
The brake switch tells the computer when you press the brake pedal. It is used for brake lights, cruise control and the shift interlock.
Codes are a starting point. They tell you which test failed, not which part to replace. Check for other stored codes and fix those in a sensible order.
Symptoms
- Cruise control not working
- Brake lights stuck on or off
- Shifter stuck in Park (on some vehicles)
Common causes
- Failed brake light switch
- Misadjusted switch
- Wiring fault
- Blown fuse
How to diagnose P0571
- Check that the brake lights work.
- Check the switch signal in live data.
How to fix it
- Adjust or replace the switch
- Repair wiring
Estimated repair cost
Likely repairs for P0571 run from about $50 to $200, depending on the cause.
| Repair | Typical range (parts + labor) |
|---|---|
| Diagnostic fee (scan + testing) | $100 - $200 |
| Brake light switch | $50 - $200 |
These are rough US estimates for an independent shop in 2026, based on typical parts prices and standard labor times. Dealers, big trucks, luxury brands and high-cost areas often run higher. They are not quotes. Use the repair cost estimator to adjust for your vehicle.
How serious is P0571?
Moderate severity
Make sure your brake lights work before driving.
P0571 FAQ
What does P0571 mean?
P0571 stands for "Brake Switch "A" Circuit". The brake switch tells the computer when you press the brake pedal.
Can I drive with a P0571 code?
Make sure your brake lights work before driving.
How much does it cost to fix P0571?
It depends on the cause. The likely repairs for P0571 range from about $50 to $200 at an independent shop in the US, plus a diagnostic fee of roughly $100-$200. These are rough estimates; dealer prices and some vehicles run higher.
What is the most common cause of P0571?
The most common causes are: failed brake light switch; misadjusted switch; wiring fault.