Powertrain
generic / SAE
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.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / numberC / 1F
Possible causes
- Sensor shorted to higher voltage high
- Open sensor medium
- Connector pins corroded - high contact resistance low
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 control module
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012