Code Definition

U2002 — Audio Bezel is Not Responding

System: Network Communication  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About U2002

U2002 is a generic (obd-ii standard) network communication diagnostic trouble code. It belongs to the U-prefix family of codes, which covers inter-module network communication (CAN, LIN, FlexRay, or similar) faults.

Scanning & clearing: Network (U) codes report communication faults between modules. When diagnosing U-codes, checking the vehicle's CAN bus integrity, supply/ground at each module, and reading all modules for related faults is usually the first step.

Because U2002 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

This DTC is stored by the Audio Control Module when it stops receiving responses from the audio bezel over the control network, which is usually a LIN bus or low speed CAN. The audio bezel is the control panel or faceplate that carries the buttons, knobs, and in many systems the touchscreen, and it reports the user inputs back to the head unit while receiving display data in return. The code sets when the bezel fails to answer polling or status messages within a calibrated time. The driver may find the audio controls unresponsive, the display blank or frozen, or button presses having no effect...

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