Powertrain, generic (extended)

P276F Electric/Auxiliary Transmission Fluid Pump B Motor Current High

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

P276F is stored when the motor of auxiliary pump B pulls more current than the module allows. Excess draw points to a motor that is working too hard or is electrically damaged: a dragging bearing, debris or varnish in the pump, very cold thick fluid, a partially shorted winding or a chafed lead touching ground. No manufacturer documents P276F publicly. Ford's 2024 OBD summary shows the matching pump A logic for the 10R60/10R80 and 8F57 transmissions, where the pump itself reports an over-current that the TCM files as P0C28 (UDS P0C26_19). To protect wiring and electronics, most controllers then switch the pump off, so the vehicle loses the functions that depend on it. If the motor stops completely, P277C is the more specific code; P276E is the low-current sibling.

Likely causes

Dragging bearing or debris inside pump B
Partially shorted motor winding
Chafed pump lead shorting to ground
Contaminated or wrong-viscosity transmission fluid

Symptoms

  • Warning lamp with transmission fault message
  • Stop-start function disabled
  • Possible whine or rattle from the pump area

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–1,400
Time1–4 h

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

Parts involved

aux trans pump bpump motor

Related codes

P276EP276DP277CP277DP0C28

References: fordservicecontent.com, static.nhtsa.gov, law.cornell.edu.