P0571 Brake Switch "A" Circuit

Powertrain Severity: Low Generic OBD-II

Fault in the brake pedal switch circuit.

Common causes

  • Faulty brake light switch
  • Misadjusted switch
  • Wiring damage

Symptoms

  • Cruise control does not work
  • Brake lights stay on or do not work

What to check

  1. Check brake lights
  2. Inspect switch adjustment
  3. Check switch signals on a scan tool

Manufacturers may add their own detail to generic codes. If your vehicle shows a different description for P0571, follow the service information for that make and model.