P0C1E code meaning
Electric/Auxiliary Transmission Fluid Pump Control Module Internal Temperature Sensor Circuit Low
Powertrain system Generic code P0Cxx codes Check engine light
What P0C1E means
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.
P0C1E at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 4 hours
- Clears after repairAfter a drive cycle
Symptoms of P0C1E
- Pump switched off as if overheated, auto-stop unavailable
- MIL after two drive cycles
Common causes of P0C1E
- Most likelyBoard temperature sensor or its signal path shorted to ground inside the module
- PossibleMeasuring circuit of the pump control module faulty
- Less likelyFluid or moisture on the module board
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Aux trans pump control module
What each part of P0C1E means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| C | Area: hybrid propulsion. |
| 1E | The exact fault in that area. |
What to do next
- Note P0C1E and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0C1E
What does P0C1E mean?
P0C1E means "Electric/Auxiliary Transmission Fluid Pump Control Module Internal Temperature Sensor Circuit Low". P0C1E reports that the signal voltage of the module's internal temperature sensor is below its valid range. It is a generic code, so it means the same on every make.
Is it safe to drive with P0C1E?
Drive gently and only to a workshop. With P0C1E the car can go into limp mode (reduced power) to protect itself.
Will P0C1E fail an emissions test?
Yes, it can. P0C1E is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0C1E to fix?
Difficulty: hard. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will P0C1E clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.