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DTC codes / U04xx · Invalid data received from a module / U04A5
The U04A5 code means the vehicle's main control module is not receiving valid data from the Hybrid/EV Battery Interface Control Module E, which is the electronic unit that monitors and reports on the high-voltage battery pack. The computer has detected that the messages coming from this module are missing, corrupted, or outside the expected range, so it cannot trust the battery data.
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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