Powertrain
generic / SAE
P277D
Electric/Auxiliary Transmission Fluid Pump B Motor Over Temperature
The second auxiliary transmission fluid pump motor has reached over-temperature. Sustained high duty or insufficient cooling.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number7 / 7D
Possible causes
- Sustained high duty cycle high
- Cooling air or fluid path blocked 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