P0C51
Drive Motor A Position Sensor Circuit A Range/Performance
The position sensor channel A of drive motor A reports a range/performance fault. Phase commutation feedback impaired on this channel.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: hard
Symptoms
- EV/hybrid system warning light on
- Reduced motor power or torque
- Possible limp mode or vehicle shutdown
Common causes
Ordered by how often each turns out to be the cause.
- Sensor mechanically offsetCommon
- Electrical noise on signal linePossible
- Sensor element aged beyond calibration windowLess likely
Parts involved
- Drive Motor A Position Sensor A
- Wiring Harness
- Hybrid Control Module
P0C51 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.