OBD-II code · Powertrain (generic)
P0C29 Electric/Auxiliary Transmission Fluid Pump A Driver Circuit Performance
The output driver of auxiliary transmission fluid pump A reports a performance fault. Driver characteristic outside calibration.
Is it safe to drive with P0C29?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyDriver IGBT aged
- PossibleThermal drift outside calibration
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 Driver
Related codes
- P277BElectric/Auxiliary Transmission Fluid Pump B Driver Circuit Performance
- P0C26Electric/Auxiliary Transmission Fluid Pump A Motor Current
- P0C27Electric/Auxiliary Transmission Fluid Pump A Motor Current Low
- P0C28Electric/Auxiliary Transmission Fluid Pump A Motor Current High
- P0C2AElectric/Auxiliary Transmission Fluid Pump A Motor Stalled
- P0C2BElectric/Auxiliary Transmission Fluid Pump Control Module Feedback Signal
- P0C2CElectric/Auxiliary Transmission Fluid Pump Control Module Feedback Signal Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.