C0450
Rear Wheel Steering Position Sensor Circuit
On vehicles with active rear wheel steering, the rear position sensor reports an electrical fault. The system disables rear steering.
- Check engine light: Not always
- Emissions related: No
- Repair difficulty: hard
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.
- Sensor failedCommon
- Actuator harness chafePossible
Parts involved
- Rear Steering Position Sensor
- Rear Steering Actuator
C0450 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.