OBD-II code · Powertrain (generic)
P0C1B Electric/Auxiliary Transmission Fluid Pump Control Module Internal Temperature Too High
The auxiliary transmission fluid pump control module reports internal temperature above the protection threshold.
Is it safe to drive with P0C1B?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySustained pump load
- PossibleAmbient temperature too high
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 Control Module
Related codes
- P0C18Drive Motor B Position Sensor Not Learned
- P0C19Drive Motor A Torque Delivered Performance
- P0C1ADrive Motor B Torque Delivered Performance
- P0C1CElectric/Auxiliary Transmission Fluid Pump Control Module Internal Temperature Sensor Circuit
- P0C1DElectric/Auxiliary Transmission Fluid Pump Control Module Internal Temperature Sensor Circuit Range/Performance
- P0C1EElectric/Auxiliary Transmission Fluid Pump Control Module Internal Temperature Sensor Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.