OBD-II code · Powertrain (generic)
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.
Is it safe to drive with P0B0C?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyPump seal aged
- PossibleInternal pump wear
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
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–8 h
- Emissions test
- Usually unaffected
- Parts involved
- Aux Trans Pump A, Transmission Fluid
Related codes
- P277AElectric/Auxiliary Transmission Fluid Pump B Hydraulic Leakage
- P0B09Electric/Auxiliary Transmission Fluid Pump A Motor Supply Voltage Circuit/Open
- P0B0AElectric/Auxiliary Transmission Fluid Pump A Motor Supply Voltage Circuit Low
- P0B0BElectric/Auxiliary Transmission Fluid Pump A Motor Supply Voltage Circuit High
- P0B0DElectric/Auxiliary Transmission Fluid Pump Motor Control Module
- P0B0EHybrid/EV Battery Pack Current Sensor B Circuit
- P0B0FHybrid/EV Battery Pack Current Sensor B Circuit Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.