DTC codes / Chrysler codes / P1478
P1478 on Chrysler vehicles indicates that the battery temperature sensor circuit has reported a voltage outside the range the powertrain control module (PCM) considers valid. The PCM monitors this sensor to protect the battery from overheating during charging, and it sets the code when the signal voltage is too high or too low for the current conditions.
Guidance is general and written for Chrysler vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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