Powertrain
generic / SAE
P0B0C
Electric/Auxiliary Transmission Fluid Pump A Hydraulic Leakage
The TCM detects hydraulic leakage from auxiliary transmission fluid pump A. Pump output cannot maintain pressure due to internal or external leak.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / numberB / 0C
Possible causes
- Pump seal aged high
- Internal pump wear 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: 400–2500 €
- Estimated time: 2–8 h
- Component: aux trans pump a
- Component: transmission fluid
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012