What does code P277C mean?

Q: What does code P277C mean?

Electric/Auxiliary Transmission Fluid Pump B Motor Stalled. P277C indicates that the transmission control module (TCM) has detected a stall condition in the electric motor that drives the auxiliary transmission fluid pump B. The TCM monitors the pump motor's speed and current draw, and when the motor fails to rotate as commanded or draws excessive current without movement, the code is set.

DTC codes / P27xx · Transmission / P277C

P277CElectric/Auxiliary Transmission Fluid Pump B Motor Stalled

P277C indicates that the transmission control module (TCM) has detected a stall condition in the electric motor that drives the auxiliary transmission fluid pump B. The TCM monitors the pump motor's speed and current draw, and when the motor fails to rotate as commanded or draws excessive current without movement, the code is set.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

AreaTransmission

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.