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DTC codes / P2Exx · Hybrid propulsion / P2E85

P2E85Battery Charger B Input Voltage Sensor Circuit Low

P2E85 indicates that the powertrain control module has detected a low voltage signal on the input voltage sensor circuit for battery charger B, which is typically the auxiliary battery charging system on hybrid and electric vehicles. The computer expects a specific voltage range from this sensor and sets the code when the signal falls below the calibrated threshold, indicating a possible short to ground, faulty sensor, or wiring issue.

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.

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