C0063
Right Rear Wheel Speed Sensor Circuit High
Voltage in the right rear wheel speed sensor circuit is above the expected range. Wheel-speed signals feed ABS, ESC, traction control, transmission and odometer — a single dropped signal disables all of these safety functions until repaired.
- Check engine light: Not always
- Emissions related: No
- Repair difficulty: medium
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Common causes
Ordered by how often each turns out to be the cause.
- Wiring shorted to B+Common
- Connector water ingressPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- Wheel Speed Sensor Rr
- Sensor Wiring
C0063 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.