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DTC codes / P2Dxx · Hybrid propulsion / P2D09
P2D09 indicates that the control module for the motor electronics coolant pump B has detected an internal overtemperature condition, meaning the electronics driving that pump are running hotter than the design limit. The computer is not reporting a pump motor failure or a coolant flow problem directly; it is flagging that the pump's control circuitry has exceeded a safe thermal threshold, which can lead to shutdown of the pump and subsequent overheating of the hybrid or electric drive system.
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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