What does code P2DD4 mean?

Q: What does code P2DD4 mean?

Control Pilot Charging Switch B Stuck On. P2DD4 means the control pilot circuit has detected that the charging switch B contact is stuck in the closed, or on, position when the vehicle's charging system expects it to be open. The computer monitors the pilot line voltage and sees a continuous closed-circuit condition that does not change with commanded state, so it flags the switch as stuck on.

DTC codes / P2Dxx · Hybrid propulsion / P2DD4

P2DD4Control Pilot Charging Switch B Stuck On

P2DD4 means the control pilot circuit has detected that the charging switch B contact is stuck in the closed, or on, position when the vehicle's charging system expects it to be open. The computer monitors the pilot line voltage and sees a continuous closed-circuit condition that does not change with commanded state, so it flags the switch as stuck on.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

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.