Trouble codes › P0571

P0571 Brake Switch "A" Circuit

Electrical and modules

P0571 means there's a problem with the brake pedal switch signal, which usually disables cruise control and can affect the brake lights.

The engine computer found a problem with the brake pedal switch signal, which it uses for cruise control, shifting out of Park and sometimes torque converter control.

Can I keep driving? Yes, but get it fixed soon.

Check that your brake lights work: if they don't, other drivers can't see you braking. Cruise control likely won't work. Get it fixed soon.

Common causes

  1. A failed or misadjusted brake light switch (common, and cheap)
  2. A broken plastic pedal stop pad letting the switch sit wrong
  3. Wiring or connector problems
  4. A blown brake light fuse

Symptoms

  • Cruise control not working
  • Brake lights stuck on or not working
  • Shifter won't come out of Park on some vehicles

What to check first

  1. Have someone check the brake lights while you press the pedal.
  2. Check the brake light fuse.
  3. Inspect the switch at the top of the brake pedal and its stop pad.
  4. Replace or adjust the switch as your service information describes.

What does P0571 mean on your vehicle?

The likely cause depends on your engine. iRepair researches your exact year, make, model and engine (service bulletins, recalls and owner reports) and tells you what to check first. Your first 3 questions are free.

Ask iRepair about P0571

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Related codes

General guidance for P0571 on most vehicles. Some makers use the same code a little differently; confirm in the service information for your vehicle, put safety first, and see a professional when in doubt.