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DTC codes / P2Dxx · Hybrid propulsion / P2D74
P2D74 indicates that the battery charging system's negative contactor control circuit is not performing within its expected range, meaning the powertrain control module has detected an abnormal voltage or current pattern on the control wire for the negative-side contactor. This contactor is a high-current relay that connects and disconnects the battery's negative terminal from the charging system, and the circuit's range or performance is outside what the module expects during commanded operation.
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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