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DTC codes / P27xx · Transmission / P27E3
P27E3 indicates that the transmission control module (TCM) has detected an open circuit or electrical fault in the control valve circuit for the electric/auxiliary transmission fluid pump. This pump maintains hydraulic pressure for shifting and lubrication when the engine is not running, such as during auto start-stop events. The TCM monitors the valve's electrical integrity and sets this code when the circuit is broken or the current draw is outside the expected range.
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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