What does code C0039 mean?

Q: What does code C0039 mean?

Right Rear Tone Wheel. C0039 indicates that the anti-lock brake system (ABS) control module has detected a fault with the right rear tone wheel, which is the toothed ring mounted on the hub or axle that the wheel speed sensor reads. The module monitors the signal from the right rear wheel speed sensor and sets this code when the tone wheel's teeth are damaged, missing, or contaminated, causing an erratic or absent signal.

DTC codes / C00xx · Brakes, steering and suspension / C0039

C0039Right Rear Tone Wheel

C0039 indicates that the anti-lock brake system (ABS) control module has detected a fault with the right rear tone wheel, which is the toothed ring mounted on the hub or axle that the wheel speed sensor reads. The module monitors the signal from the right rear wheel speed sensor and sets this code when the tone wheel's teeth are damaged, missing, or contaminated, causing an erratic or absent signal.

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.