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DTC codes / P0Cxx · Hybrid propulsion / P0C28
P0C28 indicates that the powertrain control module (PCM) has detected excessive current draw in the electrical circuit for the auxiliary transmission fluid pump motor, specifically the 'A' circuit. The PCM monitors the pump motor's current and flags this code when the measured current exceeds the calibrated threshold, which typically points to a short to ground, a failing pump motor, or a wiring fault.
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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