Code Definition

U0144 — Lost Communication With Body Control Module

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

About U0144

U0144 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 U0144 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

Control modules on the vehicle network depend on data from the Body Control Module (BCM), which manages body, security, lighting, and comfort functions and often acts as a gateway between networks. DTC U0144 is set when a receiving module does not receive valid CAN messages from the BCM within a calibrated time threshold while the network remains active. This indicates the BCM is offline because of loss of power or ground, an open, short, or high resistance fault in its CAN connection, or an internal BCM failure. When this code is set the driver may notice widespread body system faults such as...

Join TaT to view the complete code information and diagnostic details.

Quick Facts