C003DRear Wheel Speed Sensor
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- Covers a single rear wheel speed sensor on vehicles that use one combined rear speed signal, for example a rear axle or differential-mounted sensor, instead of separate left and right rear sensors. It reports rear rotation to the ABS/ESC module for anti-lock, traction and stability control and electronic brake-force distribution. The module monitors the circuit for opens, shorts to power or ground, a signal outside the valid range and a missing signal while moving. A fault disables ABS, traction and stability control and lights the ABS warning lamp while base braking remains. No manufacturer documents this code publicly; NHTSA's EPS safety report carries C003D as the rear wheel speed sensor in its J2012 table.
- What you may notice
- ABS warning lamp on
- ABS and stability control disabled
- Speedometer may read erratically
- Likely causes
- LikelyRear wheel speed sensor failed
- PossibleOpen, shorted or chafed sensor wiring
- RareCorroded sensor connector
- Repair
- Medium · Often possible to do yourself.Typical cost: €60 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.