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DTC codes / P2Dxx · Hybrid propulsion / P2D09

P2D09Motor Electronics Coolant Pump B Control Module Overtemperature

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.

SystemPowertrain
Code typeGeneric (all makes)
SeverityHigh
Fix difficultyProfessional
AreaHybrid propulsion

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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