P0C1D code meaning
Electric/Auxiliary Transmission Fluid Pump Control Module Internal Temperature Sensor Circuit Range/Performance
Powertrain system Generic code P0Cxx codes Check engine light
What P0C1D means
P0C1D means the internal temperature sensor of the auxiliary pump module delivers an electrically valid value that does not fit the other temperatures in the vehicle. No manufacturer documents this exact code publicly. GM's comparable check on the 2016 ELR pump controller, own code P1E36, runs after at least 6 hours of inactivity: the inverter reading is compared with the average of the power electronics coolant and transmission fluid temperatures, and a difference above 20 °C fails, Type B, MIL after two trips. A sensor that reads too low would let the board overheat unnoticed, which is why the Honda pump patent bases shutdown on this value. P0C1E and P0C1F cover voltage out of range, P0C1B real overtemperature.
P0C1D at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyHard
- Typical labor0.5 to 4 hours
- Clears after repairAfter a drive cycle
Symptoms of P0C1D
- MIL after repeated detection
- Start-stop restricted or unavailable
Common causes of P0C1D
- Most likelyBoard temperature sensor drifted or measuring circuit out of tolerance
- PossibleReference value wrong because the transmission fluid or coolant temperature sensor is faulty
- Less likelyInternal fault of the pump control module
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 P0C1D 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. |
| 1D | The exact fault in that area. |
What to do next
- Note P0C1D 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 P0C1D
What does P0C1D mean?
P0C1D means "Electric/Auxiliary Transmission Fluid Pump Control Module Internal Temperature Sensor Circuit Range/Performance". P0C1D means the internal temperature sensor of the auxiliary pump module delivers an electrically valid value that does not fit the other temperatures in the vehicle. It is a generic code, so it means the same on every make.
Is it safe to drive with P0C1D?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P0C1D fail an emissions test?
Yes, it can. P0C1D 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 P0C1D to fix?
Difficulty: hard. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P0C1D 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.