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DTC codes / P0Exx · Hybrid propulsion / P0E84
P0E84 indicates that the powertrain control module has detected an intermittent or erratic signal from the temperature sensor circuit of battery charger B, which is the auxiliary charging system for the high-voltage battery. The computer monitors expected voltage or resistance changes and flags the code when the sensor signal jumps, drops out, or behaves unpredictably rather than failing completely.
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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