Code Definition

U2006 — Audio Remote Climate Control Unit is Not Responding

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

About U2006

U2006 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 U2006 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 HVAC control system when it cannot establish or maintain communication with the remote climate control unit, which is usually the rear climate control head that lets rear passengers set their own temperature, fan, and mode. Communication is normally carried over a LIN bus or low speed CAN. The code sets when the remote unit fails to acknowledge requests or transmit its status within a defined period. The occupants may find the rear climate controls dead or stuck, with rear temperature or fan not adjusting, while the front climate system still o...

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