What does code P27A1 mean?

Q: What does code P27A1 mean?

Electric/Auxiliary Transmission Fluid Pump A Stuck On. P27A1 indicates that the transmission control module has detected the electric auxiliary transmission fluid pump 'A' is stuck in the on state, meaning the pump continues to run or is commanded on when it should be off. The computer typically monitors the pump's electrical circuit and may see voltage present when the pump should be de-energized, or it may detect pump operation via feedback when no command is present.

DTC codes / P27xx · Transmission / P27A1

P27A1Electric/Auxiliary Transmission Fluid Pump A Stuck On

P27A1 indicates that the transmission control module has detected the electric auxiliary transmission fluid pump 'A' is stuck in the on state, meaning the pump continues to run or is commanded on when it should be off. The computer typically monitors the pump's electrical circuit and may see voltage present when the pump should be de-energized, or it may detect pump operation via feedback when no command is present.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

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.