P0C27 code meaning
Electric/Auxiliary Transmission Fluid Pump A Motor Current Low
Powertrain system Generic code P0Cxx codes Check engine light
What P0C27 means
P0C27 means motor A of the auxiliary transmission fluid pump draws less current than expected, a sign that the pump is not loaded, for example because it sucks air or turns without delivering. Ford documents it twice. TSB 16-0111 covers 2014-16 Fusion and 2015-16 Edge with the 6F35 transmission and start-stop: MIL, P0C27 in the PCM and a harsh engagement after an auto-stop, caused by air entering the pump supply tube on transmissions built up to 26 February 2016; a new tube with a check ball fixes it. TSB 18-2282 for the 2013-17 Fusion Energi and C-Max Energi lists P0C27 and/or P0C28 and calls for reprogramming the PCM and hybrid module. P0C28 is the high side, P0C26 the general code, P0C2A a stalled motor.
P0C27 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0C27
- MIL on
- Harsh transmission engagement after a start-stop event
Common causes of P0C27
- Most likelyAir entering the pump supply tube (Ford 6F35, new tube with check ball)
- PossibleCalibration of PCM and hybrid module (Ford Fusion/C-Max Energi)
- PossibleLow transmission fluid level letting the pump draw air
- Less likelyHigh resistance or open circuit in the pump motor wiring
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Aux trans pump a motor
What each part of P0C27 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. |
| 27 | The exact fault in that area. |
What to do next
- Note P0C27 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 P0C27
What does P0C27 mean?
P0C27 means "Electric/Auxiliary Transmission Fluid Pump A Motor Current Low". P0C27 means motor A of the auxiliary transmission fluid pump draws less current than expected, a sign that the pump is not loaded, for example because it sucks air or turns without delivering. It is a generic code, so it means the same on every make.
Is it safe to drive with P0C27?
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 P0C27 fail an emissions test?
Yes, it can. P0C27 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 P0C27 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. This is a job for a workshop.
Will P0C27 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.