Code Definition

U0145 — Lost Communication With Body Control Module

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

About U0145

U0145 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 U0145 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 Powertrain Control Module (PCM) and other networked control modules communicate with the Body Control Module (BCM) over the Controller Area Network (CAN) to exchange information related to body, security, and vehicle management functions. DTC U0145 is set when a module does not receive the required CAN messages from the BCM within a calibrated time while the ignition is in the RUN position. This indicates a loss of communication due to a network fault or a power or ground failure preventing the BCM from operating on the CAN network.

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