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DTC codes / P2Bxx · Hybrid propulsion / P2BCA

P2BCABattery Charging System Positive Contactor B Control Circuit High

P2BCA indicates that the battery charging system's positive contactor B control circuit is reporting a high voltage condition, meaning the control module has detected an abnormally high signal on the circuit that commands the positive contactor to close. This contactor is a high-current relay that connects the high-voltage battery to the charging system, and a high control circuit typically points to an open circuit, a short to voltage, or a failed contactor coil rather than a charging fault itself.

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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