OBD-II FAULT CODE
P0571
Cruise Control/Brake Switch A Circuit Malfunction
Meaning, symptoms, likely causes, diagnostic checks and repair guidance for P0571.
- Check Engine light
- Poor drivability or reduced fuel economy depending on fault
- ABS/traction light, ABS disabled, possible speedometer or stability-control issues
- Dirty/damaged wheel speed sensor
- Damaged tone ring/bearing
- Wiring fault
- ABS pump/module issue
- Scan all modules and record freeze-frame data before clearing codes
- Check battery voltage and related fuses
- Inspect wheel speed sensor wiring and tone ring
- Compare live wheel speed data while spinning wheels safely
- Repair sensor wiring or replace failed sensor/bearing/tone ring
- Diagnose pump/module only after sensor circuits pass
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Disclaimer: Information is provided for general guidance only and may not apply to all vehicles. Always consult a qualified technician.