Powertrain
generic / SAE
P27E2
Electric/Auxiliary Transmission Fluid Pump B Pressure Too Low
The auxiliary transmission fluid pump B produces less pressure than expected for the commanded duty. Pump aging, leakage, or fluid loss.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number7 / E2
Possible causes
- Pump worn or leaking internally high
- Transmission fluid level low 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: hard
- DIY: shop recommended
- Estimated cost: 400–2200 €
- Estimated time: 2–7 h
- Component: aux transmission pump b
- Component: transmission fluid
- Component: valve body
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012