OBD-II code · Powertrain (generic)
P0C1F Electric/Auxiliary Transmission Fluid Pump Control Module Internal Temperature Sensor Circuit High
The internal temperature sensor reports voltage above the expected window. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Is it safe to drive with P0C1F?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySensor shorted to higher voltage
- PossibleOpen sensor
- Less likelyConnector pins corroded - high contact resistance
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
- 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
- P0C20Electric/Auxiliary Transmission Fluid Pump Phase U-V-W Circuit/Open
- P0C21Electric/Auxiliary Transmission Fluid Pump Phase U-V-W Circuit Low
- P0C22Electric/Auxiliary Transmission Fluid Pump Phase U-V-W Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.