P0571 Cruise Control/Brake Switch A Circuit Malfunction
What does P0571 mean?
P0571 — Cruise Control/Brake Switch A Circuit Malfunction. This is an OBD-II diagnostic trouble code a scanner retrieves when your vehicle's computer detects cruise control/brake switch a circuit malfunction. The level of risk depends on how the vehicle is currently running and how long you've been driving with the light on.
Common causes of P0571
- Faulty brake pedal switch
- Misadjusted brake switch
- Open or shorted brake switch circuit
- Damaged wiring or connector
- Fault in cruise control module or PCM
How to fix P0571
- Inspect brake pedal switch mounting and adjustment
- Test brake light operation and switch continuity
- Check wiring and connector for damage
- Verify switch states change correctly on an OBD-II scanner
- Replace the brake switch if operation is incorrect