Cold Start Hybrid/EV Drive Motor Performance
During cold start, the hybrid drive motor does not deliver the expected torque or speed. Cold lubricant viscosity or magnet temperature affects motor characteristic.
Affected components
- Drive motor a
- Inverter
- Hv battery
Common causes
- High likelihood: Cold lubricant viscosity high
- Medium likelihood: Magnet temperature outside design
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
- A drive cycle may be required after repair
- 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.