Code Definition

U0156 — Lost Communication With Information Centre A

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

About U0156

U0156 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 U0156 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 Instrument Panel Cluster (IPC), Body Control Module (BCM), and other networked modules communicate with Information Centre A over the Controller Area Network (CAN) to display driver information, warnings, and system status messages. DTC U0156 is set when a control module does not receive valid CAN messages from Information Centre A within a calibrated time while the ignition is in the RUN position. This indicates a loss of network communication or a power or ground failure preventing the information centre from operating on the CAN network.

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