Powertrain
generic / SAE
P277C
Electric/Auxiliary Transmission Fluid Pump B Motor Stalled
The second auxiliary transmission fluid pump motor is commanded on but the rotor does not turn.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number7 / 7C
Possible causes
- Impeller jammed by sediment or debris high
- Motor seized by bearing failure medium
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
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 200–1200 €
- Estimated time: 1–3.5 h
- Component: aux trans pump b
- Component: pump motor
- MIL / check engine light
Sources
References
sae:J2012