C003CRear Tone Wheel
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- Covers a single rear tone wheel (reluctor or encoder ring) on vehicles that use one combined rear wheel speed signal, for example from a differential or rear axle sensor, rather than separate left and right rear rings. It is a signal-plausibility code set when the module sees an erratic, noisy or intermittent rear speed signal consistent with a damaged, contaminated or loose tone ring rather than a sensor circuit failure. A fault disables ABS, traction and stability control and lights the ABS warning lamp while base braking remains; on such vehicles rear-based functions like electronic brake-force distribution are affected. No manufacturer documents this code publicly; NHTSA's EPS safety report lists the rear tone wheel code C003C among the J2012 wheel speed codes.
- What you may notice
- ABS warning lamp on
- ABS and stability control disabled
- Intermittent rear speed signal
- Likely causes
- LikelyDamaged or contaminated tone ring
- PossibleLoose or displaced bearing or axle ring
- RareExcessive sensor-to-ring air gap
- Repair
- Medium · Usually a job for a workshop.Typical cost: €100 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.