What does code C05B8 mean?

Q: What does code C05B8 mean?

Brake Booster Motor A Position Sensor Supply Circuit/Open. The C05B8 code indicates that the antilock brake system (ABS) control module has detected an open circuit or supply voltage problem in the wiring that feeds the position sensor for brake booster motor A. This sensor reports the motor's position to the control module, and without a valid signal the system cannot accurately manage brake assist. The module sets this code when the sensor's supply circuit is open or its voltage is outside the expected range.

DTC codes / C05xx · Brakes, steering and suspension / C05B8

C05B8Brake Booster Motor A Position Sensor Supply Circuit/Open

The C05B8 code indicates that the antilock brake system (ABS) control module has detected an open circuit or supply voltage problem in the wiring that feeds the position sensor for brake booster motor A. This sensor reports the motor's position to the control module, and without a valid signal the system cannot accurately manage brake assist. The module sets this code when the sensor's supply circuit is open or its voltage is outside the expected range.

SystemChassis

Code typeGeneric (all makes)

SeverityHigh

Fix difficultyProfessional

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.