DTC codes / P2Dxx · Hybrid propulsion / P2D9C
P2D9C indicates that the engine control module (ECM) has detected an intermittent or erratic current signal on the phase V circuit of the starter/generator unit, which is the motor-generator used in mild-hybrid systems. The ECM monitors this circuit for consistent current flow, and when the signal drops out or fluctuates beyond a calibrated threshold, it stores this code.
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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