Code Definition

U0184 — Lost Communication With Radio Module

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

About U0184

U0184 is a generic (obd-ii standard) network communication diagnostic trouble code recorded for Ford vehicles. 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 U0184 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 Audio Control Module, Body Control Module (BCM), and Instrument Panel Cluster (IPC) communicate with the radio module over the Controller Area Network (CAN) to manage audio functions, user inputs, and display information. DTC U0184 is set when a receiving module does not detect valid CAN messages from the radio module within a calibrated time while the ignition is in the RUN position. This indicates a network communication failure or a loss of power or ground preventing the radio module from operating on the CAN network.

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