What does code U0346 mean?

DTC codes / U03xx · Software and configuration mismatches / U0346

U0346Software Incompatibility With Hybrid/EV Battery Interface Control Module M

U0346 is a network communication fault indicating that the hybrid or electric vehicle battery interface control module (often called the battery energy control module) is reporting a software incompatibility to other modules on the vehicle network. The computer detected that the software calibration or version in the battery interface module does not match what the other controllers expect, so the modules cannot reliably share battery data.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

AreaSoftware and configuration mismatches

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.