What does code C0047 mean?

Q: What does code C0047 mean?

Brake Booster Pressure Sensor. C0047 means the anti-lock brake system (ABS) module has detected a fault in the brake booster pressure sensor circuit, which monitors the vacuum or hydraulic pressure assisting your brake pedal. The computer compares the sensor signal against expected values and flags the code when the reading is out of range, erratic, or missing entirely.

DTC codes / C00xx · Brakes, steering and suspension / C0047

C0047Brake Booster Pressure Sensor

C0047 means the anti-lock brake system (ABS) module has detected a fault in the brake booster pressure sensor circuit, which monitors the vacuum or hydraulic pressure assisting your brake pedal. The computer compares the sensor signal against expected values and flags the code when the reading is out of range, erratic, or missing entirely.

SystemChassis

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaBrakes, steering and suspension

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.