Electric/Auxiliary Transmission Fluid Pump B Motor Current Low
The measured current of the second auxiliary transmission fluid pump motor is below the lower threshold. Pump may be free-spinning or motor partially open.
Affected components
- Aux trans pump b
- Pump motor
Common causes
- High likelihood: Partial winding open in motor
- Medium likelihood: Pump impeller decoupled from motor shaft
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
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.