Code Definition

U0141 — Lost Communication With Body Control Module

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

About U0141

U0141 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 U0141 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

Multiple control modules on the vehicle communicate with the Body Control Module (BCM) over the Controller Area Network (CAN) to exchange status and command information for body, security, and comfort functions. DTC U0141 is set when a module does not receive valid CAN messages from the BCM 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 to the BCM, preventing it from participating on the CAN network.

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