What does code C051A mean?

Q: What does code C051A mean?

Left Rear Wheel Speed Sensor - Mechanical. C051A indicates that the anti-lock brake system (ABS) module has detected a mechanical fault with the left rear wheel speed sensor circuit, meaning the sensor is producing an erratic or missing signal that does not match expected wheel behavior. The computer compares the left rear wheel speed to the other three wheels and flags this code when the signal is mechanically inconsistent, such as an air gap problem or damaged tone ring.

DTC codes / C05xx · Brakes, steering and suspension / C051A

C051ALeft Rear Wheel Speed Sensor - Mechanical

C051A indicates that the anti-lock brake system (ABS) module has detected a mechanical fault with the left rear wheel speed sensor circuit, meaning the sensor is producing an erratic or missing signal that does not match expected wheel behavior. The computer compares the left rear wheel speed to the other three wheels and flags this code when the signal is mechanically inconsistent, such as an air gap problem or damaged tone ring.

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.