Drive Motor A Coolant Temperature Sensor Circuit Range/Performance
The ECM detects a range/performance fault on the drive motor a coolant temperature sensor circuit. Reading cannot be used reliably for control.
Affected components
- Drive motor a coolant temp sensor
- Wiring harness
- Hybrid control module
Common causes
- High likelihood: Sensor characteristic drifted
- Medium likelihood: Sensor mounting displaced
- Low likelihood: Sensor element aged beyond calibration window
Possible symptoms
- EV/hybrid system warning light on
- Reduced motor power or torque
- Possible limp mode or vehicle shutdown
Diagnostic notes
- The malfunction indicator lamp may illuminate
- Reduced-power or limp mode may occur
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.