P0571 — Brake Switch A Circuit Malfunctioning

Severity: Warning Can you drive? With caution: limp mode possible, have it checked soon Make: All makes (OBD-II standard)

Meaning	The engine computer has detected an issue with the main brake pedal switch circuit. This switch tells the computer when you are stepping on the brake pedal, which affects cruise control and other vehicle systems.
Family	Powertrain (P)

Typical symptoms

The cruise control system does not turn on or stay engaged
The brake lights may stay on all the time or fail to light up when pressing the pedal
The traction control or stability control warning light may turn on

Common causes

A faulty or misadjusted brake pedal switch
Blown fuse related to the brake light circuit
Corroded or damaged wiring and electrical connectors at the pedal switch

What to do

Check the operation of your brake lights first to see if they work normally when pressing the pedal. You should have this checked soon, as a failing brake switch affects safety systems and brake light signaling for drivers behind you.

Frequently asked questions

What does code P0571 mean?

Brake Switch A Circuit Malfunctioning. The engine computer has detected an issue with the main brake pedal switch circuit. This switch tells the computer when you are stepping on the brake pedal, which affects cruise control and other vehicle systems.

Can I keep driving with code P0571 active?

With caution: limp mode possible, have it checked soon

Common causes — P0571

A faulty or misadjusted brake pedal switch Blown fuse related to the brake light circuit Corroded or damaged wiring and electrical connectors at the pedal switch

How do you fix code P0571?

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Where to get it fixed

P0571 — Brake Switch A Circuit Malfunctioning

Typical symptoms

Common causes

What to do

Frequently asked questions

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