What it means
The ECM detects a circuit intermittent/erratic 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 control motor output and protect the electronics from heat. This code sets when the sensor C signal is intermittent or erratic, such as when a loose connector or unstable ground makes the reading jump unexpectedly.
Common causes
Most likely first.
- Sensor connector not seated
- Noisy ground reference
- Connector with intermittent contact under vibration
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 data and graph sensor C live data to check for sudden jumps or dropouts compared with other drive motor inverter temperatures.
- With the vehicle powered down as specified by the manufacturer, confirm the sensor C connector is fully seated and inspect its terminals for corrosion or damage.
- Inspect the sensor C harness and ground reference for chafing, looseness, or movement-related damage.
- If the manufacturer's procedure permits, monitor sensor C while gently moving the harness to locate an intermittent contact.
- Test the sensor C ground, wiring continuity, and sensor response against the manufacturer's specification, then confirm the reading remains stable.
Common fixes
- Reseat and secure the drive motor inverter sensor C connector.
- Clean or repair corroded terminals and restore the sensor C ground reference.
- Repair harness damage or wiring that loses contact with movement.
- Replace sensor C if its signal remains erratic after connector and wiring repairs.
Can I keep driving?
Avoid demanding driving because the vehicle may intermittently reduce motor power or enter a protective mode. Stop safely if power becomes unpredictable or the vehicle displays a shutdown warning.
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.