Code Definition

U0255 — Lost Communication With Front Display Interface Module

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

About U0255

U0255 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 U0255 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

The vehicle control modules communicate over the Controller Area Network (CAN) to exchange display, infotainment, and system status information. DTC U0255 sets when one or more modules do not receive the expected CAN messages from the Front Display Interface Module within a calibrated time period. This indicates the module is not communicating, typically due to loss of power or ground, a CAN circuit fault, or an internal module failure. The front display interface module drives the central screen that presents infotainment, climate, and vehicle information, so a customer commonly reports a bla...

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