DTC codes / U02xx · Lost communication with a control module / U023C
U023C is a generic network communication code indicating that a control module on the vehicle's Controller Area Network (CAN) bus has lost contact with the Image Processing Module C, which is typically one of the camera-based driver assistance modules. The computer that set the code has detected that the module is no longer broadcasting its expected periodic messages on the network.
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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