C003ARight Rear Wheel Speed Sensor
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- Covers the right rear wheel speed sensor and its circuit, completing the four-corner sensor set with C0031, C0034 and C0037. The active sensor reports rear wheel 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. Ford documents C003A with C0036 and C0037 on 2021 Bronco and Ranger vehicles built in a specific window, with an illuminated ABS warning. A fault disables ABS, traction and stability control and lights the ABS warning lamp while base braking remains available.
- What you may notice
- ABS warning lamp on
- ABS and stability control disabled
- Speedometer may read erratically
- Likely causes
- LikelyWheel speed sensor bent or 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.