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DTC codes / P27xx · Transmission / P276A
P276A indicates that the transmission control module (TCM) has detected an open circuit or supply voltage fault in the electrical path for the auxiliary transmission fluid pump motor, specifically on the B-side circuit. This pump is used in some automatic transmissions to maintain fluid pressure when the engine is stopped, such as during engine auto-stop events, and the TCM monitors the motor supply voltage to ensure the pump can operate when commanded.
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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