P0C57 Possible Causes
- Faulty drive motor generator
- Drive motor harness is open or shorted
- Poor electrical connection in drive motor generator circuit
What Does It Mean?
How to Fix Code P0C57
Check the “possible causes” listed above. Visually inspect the related wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
P0C57 Possible Symptoms
Engine light on (or service engine soon warning light)
P0C57 Meaning
The drive motor generator position sensor is monitored by the motor control module. The motor control module monitors the angular position, speed, and direction of the drive motor generator rotor based on signals from the resolver-type position sensor. The position sensor contains one exciter coil, two sensing coils, and an irregularly shaped metal rotor. The metal rotor is mechanically attached to the drive motor-generator shaft. When the vehicle is turned on, the motor control module sends a 7V AC, 10 kHz excitation signal to the exciter coil. The exciter coil’s signal creates a magnetic field around the two sensing coils and the irregularly shaped rotor. The motor control module then monitors the two sensing coil circuits for a return signal. The position of the irregular metal rotor causes the magnetically induced return signals from the sensing coils to vary in size and shape. Comparing the two signals from the sensing coils allows the motor control module to determine the exact position, speed, and direction of the drive motor-generator rotor. The position sensor is a non-repairable part of the drive motor generator.