DTC codes / P2Exx · Hybrid propulsion / P2E85
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.
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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