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DTC codes / P27xx · Transmission / P27E5
P27E5 indicates that the transmission control module (TCM) has detected an abnormally low voltage or current on the control valve circuit for the electric or auxiliary transmission fluid pump. This pump maintains hydraulic pressure for the transmission during engine stop-start events or when the engine is off, and a low circuit condition means the TCM cannot reliably command the valve.
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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