Code Definition

U0146 — Lost Communication With Gateway Module A

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

About U0146

U0146 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 U0146 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

Gateway Module A manages and routes communication between multiple Controller Area Network (CAN) buses, such as high speed and medium speed networks, to allow information exchange between powertrain, chassis, and body systems. DTC U0146 is set when a control module does not receive the required communication messages from Gateway Module A within a calibrated time while the ignition is in the RUN position. This indicates that the gateway is not transmitting or receiving network data due to a communication fault or a loss of power or ground. Because the gateway bridges several buses, a fault her...

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