P0C1EElectric/Auxiliary Transmission Fluid Pump Control Module Internal Temperature Sensor Circuit Low
- 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
- P0C1E reports that the signal voltage of the module's internal temperature sensor is below its valid range. With the usual NTC thermistor, low voltage corresponds to a very high temperature, so a short to ground looks like an overheated board. No manufacturer documents this exact code publicly. GM shows the scale on the 2016 ELR pump controller with its own code P1E35, labelled circuit low: a reading above 130 °C, near 0 V, for 250 of 350 samples at 10.4 ms sets a Type B fault, MIL after two trips. The Honda CVT pump patent uses this board value to cut the pump relay, so a shorted sensor can stop the pump although nothing is hot. P0C1F is the high side, P0C1B a genuine overtemperature.
- What you may notice
- Pump switched off as if overheated, auto-stop unavailable
- MIL after two drive cycles
- Likely causes
- LikelyBoard temperature sensor or its signal path shorted to ground inside the module
- PossibleMeasuring circuit of the pump control module faulty
- RareFluid or moisture on the module board
- 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.