What it means
The ECM detects a circuit high fault on the drive motor a temperature sensor c circuit. Reading cannot be used reliably for control.
At a glance
- Usually lights the check-engine light
- The engine or gearbox may go into limp mode
How it works
Drive Motor A temperature sensor C sends a temperature signal to the control module for motor protection. This code sets when the module detects the sensor C circuit signal too high, which may come from a short to battery voltage, an open sensor, or a poor connection.
Common causes
Most likely first.
- Signal wire shorted to B+
- Open sensor
- Connector pins corroded - high contact resistance
Symptoms
- EV/hybrid system warning light on
- Reduced motor power or torque
- Possible limp mode or vehicle shutdown
How to diagnose it
- Review freeze-frame and live data for Drive Motor A temperature sensor C; a reading fixed unusually high can help confirm the high-signal fault.
- Inspect the sensor C connector and harness for damage, corrosion, loose pins, or contact with a power feed.
- Use the manufacturer's procedure to check the sensor C signal wire for a short to battery voltage and for opens in the circuit.
- Test sensor C and its connector terminals against the manufacturer's specifications to distinguish an open sensor from a wiring or contact fault.
- Repair the identified issue, clear the code, and verify sensor C returns a plausible reading.
Common fixes
- Repair a sensor C signal wire shorted to battery voltage.
- Restore a broken wire or poor connection in the sensor C circuit.
- Replace an open or failed Drive Motor A temperature sensor C.
- Clear the code and confirm the high reading does not recur.
Can I keep driving?
Keep driving only as needed to reach a safe place or service, and avoid high-load use because the vehicle may limit motor torque or shut down if it cannot verify temperature. Stop if a shutdown warning or major power loss occurs; an unreliable reading can compromise motor protection.
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.