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DTC codes / P2Bxx · Hybrid propulsion / P2BC9

P2BC9Battery Charging System Positive Contactor B Control Circuit Low

P2BC9 indicates that the battery charging system's positive contactor control circuit B has been detected as low by the vehicle's control module. The computer monitors the voltage on the control wire for the positive contactor and sets this code when the signal falls below the expected threshold, indicating a short to ground, an open circuit, or a faulty contactor.

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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