What does code P2E91 mean?

Q: What does code P2E91 mean?

Battery Charger B Internal Power Supply Performance. P2E91 indicates that the battery charger module (often part of the onboard charging system in electrified vehicles) has detected an internal fault in its own power supply circuitry. The charger's control electronics monitor their internal voltage rails and reference signals, and when one falls outside the expected operating range, the module sets this code and typically disables charging to protect the hardware.

DTC codes / P2Exx · Hybrid propulsion / P2E91

P2E91Battery Charger B Internal Power Supply Performance

P2E91 indicates that the battery charger module (often part of the onboard charging system in electrified vehicles) has detected an internal fault in its own power supply circuitry. The charger's control electronics monitor their internal voltage rails and reference signals, and when one falls outside the expected operating range, the module sets this code and typically disables charging to protect the hardware.

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.