Code Definition

U2019 — Audio Voice Module Not Responding

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

About U2019

U2019 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 U2019 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 audio voice module, the unit that handles voice recognition and hands free command processing, over its network, typically MOST, LIN, or low speed CAN. The voice module interprets spoken commands from the cabin microphone and passes them to the head unit and connected features. The code sets when the voice module does not acknowledge requests or send valid data within a defined time. The driver may find voice control and voice dialling unavailable or greyed out, while normal audio playbac...

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