Powertrain
generic / SAE
P27A2
Electric/Auxiliary Transmission Fluid Pump B Control Circuit / Open
The controller cannot drive the second auxiliary transmission fluid pump.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number7 / A2
Possible causes
- Open pump motor winding high
- Broken control wire 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: 1–4 h
- Component: aux trans pump b
- Component: pump relay
- Component: wiring harness
- MIL / check engine light
Sources
References
sae:J2012