Cold Start Hybrid/EV Drive Motor Inverter Torque Performance
During cold start, the inverter cannot deliver commanded torque to the drive motor within the expected window. Cold capacitor characteristic or switching loss elevated.
Affected components
- Drive motor a
- Inverter
- Hv battery
Common causes
- High likelihood: DC-link capacitor cold characteristic
- Medium likelihood: IGBT switching characteristic at cold
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.