Brake light switch
P0571
Brake Switch "A" Circuit
The switch at the brake pedal that tells the car you're braking has a circuit fault.
Fix it soon
Can I keep driving? For a short while, gently. Have it checked in the next few days, and stop if the car feels, sounds or smells different. Your brake lights may not work, cruise control may not work, and an automatic may not shift out of Park.
Common causes
- A failed or misadjusted brake light switch
- A blown fuse
- Wiring trouble
Listed roughly from most to least likely. The same code can have different causes on different cars.
What to do
- Have someone check that your brake lights come on. That's a safety item.
- Replace the switch. It's usually inexpensive.
General guidance. Your owner's manual wins. If a red warning light is on or the car drives differently, stop safely and get help.
Track this automatically in Tagwell Auto
Tagwell Auto keeps your car's service dates and mileage, so when a code shows up you know what was done last. With a Bluetooth reader for the car's diagnostic port (called OBD-II), the phone app can read the code itself.