Powertrain, generic · Hybrid propulsion

P0C27 Electric/Auxiliary Transmission Fluid Pump A Motor Current Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

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.

Likely causes

Air entering the pump supply tube (Ford 6F35, new tube with check ball)
Calibration of PCM and hybrid module (Ford Fusion/C-Max Energi)
Low transmission fluid level letting the pump draw air
High resistance or open circuit in the pump motor wiring

Symptoms

  • MIL on
  • Harsh transmission engagement after a start-stop event

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–600
Time0.5–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

aux trans pump a motor

Related codes

P0C26P0C28P0C2AP2797P0B01

References: static.nhtsa.gov, static.nhtsa.gov.