Mazda
Brake booster vacuum sensor circuit fault. Brake assist from the vacuum pump may be reduced; check booster vacuum.
P0555 fault code: what it means
P0555: Brake booster vacuum sensor circuit fault. Brake assist from the vacuum pump may be reduced; check booster vacuum.
Usual causes, most likely first
- brake booster vacuum sensor
- vacuum hose leak
- wiring fault
- vacuum pump weak (diesel)
P0555 by make
What the repair usually costs
- ABS / brake booster actuator replacement (Toyota hybrid)NZ$1,280–NZ$3,430 · A$1,140–A$3,090
Not sure what P0555 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.