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DTC codes / P0Cxx · Hybrid propulsion / P0C85
P0C85 indicates that the hybrid or electric vehicle battery temperature sensor in circuit H is sending an intermittent or erratic signal to the battery energy control module. The computer detects this when the sensor voltage momentarily drops out or jumps in a way that does not match the expected temperature profile, often logging the fault without permanently disabling the system.
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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