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DTC codes / P27xx · Transmission / P277D

P277DElectric/Auxiliary Transmission Fluid Pump B Motor Over Temperature

P277D indicates that the transmission control module has detected an over-temperature condition in the electric or auxiliary transmission fluid pump motor, specifically the 'B' motor circuit. The computer monitors pump motor temperature through a sensor or inferred calculation and sets this code when the temperature exceeds a calibrated threshold, typically due to excessive load, cooling system faults, or electrical issues.

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.

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