Electric/Auxiliary Transmission Fluid Pump B Motor Stalled
The second auxiliary transmission fluid pump motor is commanded on but the rotor does not turn.
Affected components
- Aux trans pump b
- Pump motor
Common causes
- High likelihood: Impeller jammed by sediment or debris
- Medium likelihood: Motor seized by bearing failure
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.