DTC codes / U03xx · Software and configuration mismatches / U0344
U0344 is a network communication fault indicating that a control module on the vehicle's data bus has detected a software incompatibility with the Hybrid/EV Battery Interface Control Module K. The computer is not reporting a failed battery pack or a wiring short; it is reporting that the software versions, calibration files, or configuration data exchanged between modules do not match what the system expects.
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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