What it means
The position sensor channel C of drive motor A reports a circuit fault. The drive motor's position, current and temperature are watched continuously; a fault here downgrades the inverter to a safe operating point or triggers torque reduction.
At a glance
- Usually lights the check-engine light
- The engine or gearbox may go into limp mode
How it works
Drive motor A's position sensor channel C provides position information that the inverter uses to control motor torque. This code sets when the channel C circuit has an electrical fault, so the inverter may reduce torque or enter a protective operating mode.
Common causes
Most likely first.
- Position sensor failed
- Wiring fault
Symptoms
- EV/hybrid system warning light on
- Reduced motor power or torque
- Possible limp mode or vehicle shutdown
How to diagnose it
- Save freeze-frame data and scan the hybrid or EV system for related motor, inverter, and position-sensor codes.
- With the vehicle powered down under the manufacturer's high-voltage safety procedure, inspect the drive motor A channel C connector and accessible wiring for damage or poor contact.
- Check whether live data or scan-tool status shows the channel C signal missing or faulty when the motor system is enabled, if supported.
- Test the channel C wiring and sensor circuit using the manufacturer's procedure, without disturbing high-voltage components outside the approved process.
- Compare sensor and circuit results with the manufacturer's specification before replacing the position sensor or repairing wiring.
Common fixes
- Secure a loose or damaged channel C connector.
- Repair damaged wiring in the drive motor A position sensor channel C circuit.
- Replace the channel C position sensor if testing confirms it has failed.
- Clear the code and confirm normal motor operation and torque response.
Can I keep driving?
Reduced motor torque or a protective shutdown can affect acceleration and the vehicle may not remain drivable. Avoid high-speed or high-load driving; stop safely if power drops sharply or a shutdown warning appears.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.