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DTC codes / P27xx · Transmission / P276B
P276B indicates that the transmission control module (TCM) has detected a low voltage condition on the supply circuit for the electric or auxiliary transmission fluid pump B motor. This pump is used in some automatic transmissions to maintain fluid pressure when the engine is not running, such as during stop-start operation, and a low supply voltage can prevent it from operating correctly.
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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