Electric/Auxiliary Transmission Fluid Pump Motor Phase W Current
The phase W current of the auxiliary transmission fluid pump motor reports a current fault. Pump phase commutation impaired.
Affected components
- Aux trans pump motor phase w
- Wiring harness
- Tcm
Common causes
- High likelihood: Phase current sensor failed
- Medium likelihood: Wiring fault
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.