Is It Safe to Drive With a C0031 Code?
Common Symptoms of a C0031 Fault
ABS warning light
Traction control warning light
Stability control warning light
EML may illuminate
ABS, TC and ESC disabled
Possible Causes of C0031
A C0031 code can be triggered by faults across several systems. Identifying the exact root cause requires proper diagnostic equipment and live data — not just reading the code.
Wheel Speed Sensor Wiring Fault
Wiring or connector to the right front sensor is damaged — common due to wheel movement.
Wheel Speed Sensor Failure
The sensor itself has failed.
Reluctor Ring Damage
The ABS ring on the wheel bearing or driveshaft is damaged or has debris.
Bearing Failure
A worn wheel bearing has damaged the integral ABS reluctor ring.
Why we don't list the exact part: A C0031 code tells you what's happening but not why. Replacing parts based on the code alone is the most common way drivers waste money. A proper diagnosis identifies the specific cause first.
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C0031 and Your MOT
A stored C0031 fault code will cause your car to fail its MOT. The engine management light will be illuminated during the test — an automatic failure under current MOT standards. Even if the light temporarily clears, the code remains in ECU memory and can be read by testers.
Get the fault diagnosed and repaired first, then have the code cleared and confirm the light stays off before booking your MOT.