Code Definition

U2008 — Audio Phone is Not Responding

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

About U2008

U2008 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 U2008 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 or infotainment system when it stops communicating with the integrated or external phone module, such as the Bluetooth hands free unit, over its network, typically MOST, LIN, or low speed CAN. The phone module manages hands free calling, phone audio, and often contact and message features, exchanging status data with the head unit. The code sets when the phone module does not respond to network requests or send its expected status within a defined time. The driver may find hands free calling unavailable, no phone audio, or the phone menu missing, ...

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