What does code C05A8 mean?

Q: What does code C05A8 mean?

ABS Pump Motor Supply Voltage B Circuit Range/Performance. This code indicates that the anti-lock braking system (ABS) control module has detected an abnormal voltage condition on the electrical circuit that supplies power to the ABS pump motor, specifically on the 'B' circuit which is typically the ground or return path. The module monitors the voltage on this circuit during self-tests and operation, and when the voltage falls outside the expected range for a calibrated period, it stores this diagnostic trouble code and illuminates the ABS warning light.

DTC codes / C05xx · Brakes, steering and suspension / C05A8

C05A8ABS Pump Motor Supply Voltage B Circuit Range/Performance

This code indicates that the anti-lock braking system (ABS) control module has detected an abnormal voltage condition on the electrical circuit that supplies power to the ABS pump motor, specifically on the 'B' circuit which is typically the ground or return path. The module monitors the voltage on this circuit during self-tests and operation, and when the voltage falls outside the expected range for a calibrated period, it stores this diagnostic trouble code and illuminates the ABS warning light.

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.