Electric/Auxiliary Transmission Fluid Pump A Driver Circuit Performance
The output driver of auxiliary transmission fluid pump A reports a performance fault. Driver characteristic outside calibration.
Affected components
- Aux trans pump a driver
Common causes
- High likelihood: Driver IGBT aged
- Medium likelihood: Thermal drift outside calibration
Possible symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Diagnostic notes
- The malfunction indicator lamp may illuminate
- Reduced-power or limp mode may occur
Related codes
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.