What does code P2DBB mean?

DTC codes / P2Dxx · Hybrid propulsion / P2DBB

P2DBBBattery Charging System B High Voltage Interlock Circuit Intermittent/Erratic

P2DBB indicates that the vehicle's battery charging system B has reported an intermittent or erratic fault in its high-voltage interlock loop, a safety circuit that confirms high-voltage connectors are properly seated. The computer detected unstable or sporadic continuity in the interlock circuit, meaning the safety loop is not providing a consistent signal.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

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.