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DTC codes / P2Dxx · Hybrid propulsion / P2D9F

P2D9FHigh Voltage System Voltage High

P2D9F indicates that the high-voltage system voltage has exceeded the manufacturer's specified maximum, as detected by the battery energy control module or hybrid control module. The computer monitors the high-voltage bus and sets this code when the voltage rises above the safe threshold, often due to a charging system fault or a battery pack issue.

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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