What does code P2BCB mean?

Q: What does code P2BCB mean?

Battery Charging System Negative Contactor B Circuit. P2BCB indicates that the battery charging system's negative contactor control circuit has a fault, meaning the powertrain control module has detected an unexpected voltage or current condition on the low-side control wire for the negative contactor. The contactor is a high-current relay that connects the battery's negative terminal to the charging system, and the circuit fault prevents reliable switching, which can leave the charging system unable to energize or de-energize correctly.

DTC codes / P2Bxx · Hybrid propulsion / P2BCB

P2BCBBattery Charging System Negative Contactor B Circuit

P2BCB indicates that the battery charging system's negative contactor control circuit has a fault, meaning the powertrain control module has detected an unexpected voltage or current condition on the low-side control wire for the negative contactor. The contactor is a high-current relay that connects the battery's negative terminal to the charging system, and the circuit fault prevents reliable switching, which can leave the charging system unable to energize or de-energize correctly.

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.