P0571 fault code: what it means
P0571: Brake switch A circuit fault. Brake lights and cruise control may be affected.
Usual causes, most likely first
- worn or failed brake light switch
- switch out of adjustment or broken pedal stop pad
- blown brake light bulb or fuse
Not sure what P0571 means on your car? Ask Credov.
Before you clear it
Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.
Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.