P0C1FElectric/Auxiliary Transmission Fluid Pump Control Module Internal Temperature Sensor Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P0C1F means the internal temperature sensor of the auxiliary pump module delivers a voltage above its valid range, which for an NTC thermistor reads as an implausibly cold board and usually indicates an open sensor path. No manufacturer documents this exact code publicly. GM's ELR pump controller of 2016 shows the matching case under its own code P1E34, labelled circuit high: below -58 °C, near 5 V, for 250 of 350 samples sets the fault, Type B in the ELR tables. With such a value the controller loses its overtemperature protection; the Honda CVT pump patent shows that this protection is what keeps the driver board alive, so the pump is typically restricted. P0C1E is the low side, P0C1D the plausibility check, P0C1B real overtemperature.
- What you may notice
- MIL after two drive cycles
- Start-stop restricted, pump in protective mode
- Likely causes
- LikelyBoard temperature sensor open or its solder joint cracked
- PossibleMeasuring circuit of the pump control module faulty
- RareGround offset at the pump module shifting the sensor voltage
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €300 – €1,800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.