What it means
The ECM detects a circuit range/performance fault on the drive motor inverter 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 inverter temperature sensor C monitors a specific point in the drive motor inverter so the ECM can manage motor output and prevent overheating. This code sets when sensor C's signal is electrically plausible but its value or response falls outside the expected temperature relationship or operating range.
Common causes
Most likely first.
- Sensor characteristic drifted
- Sensor mounting displaced
- Sensor element aged beyond calibration window
Symptoms
- EV/hybrid system warning light on
- Reduced motor power or torque
- Possible limp mode or vehicle shutdown
How to diagnose it
- Check freeze-frame conditions and compare sensor C live data with the other drive motor inverter temperatures as the vehicle warms or cools.
- Inspect the sensor C connector and harness for looseness, corrosion, damage, or evidence the sensor has shifted from its intended mounting position.
- Check whether sensor C tracks temperature changes consistently rather than remaining offset or changing implausibly relative to nearby readings.
- Inspect sensor C seating and mounting using the manufacturer's service information without disturbing high-voltage components outside the specified procedure.
- Test sensor C response and circuit values against the manufacturer's specification, then confirm readings align after repair.
Common fixes
- Secure the sensor C connector and correct any mounting displacement using the manufacturer's procedure.
- Repair damaged or corroded wiring and terminals affecting the sensor C signal.
- Replace drive motor inverter temperature sensor C if its response has drifted outside specification.
- Clear the code and verify sensor C tracks temperature normally.
Can I keep driving?
Limit acceleration and sustained high-load driving because the system may reduce drive motor torque to protect the inverter. Stop safely if power falls substantially or a protective 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.