What is the U0155 error code?

The supervising module monitors the communication network for heartbeat signals or cyclic data packets originating from the Instrument Panel Cluster. If the expected data frame is absent for a duration exceeding the manufacturer-defined timeout window, the fault is logged. The evaluation typically occurs continuously whenever the module is in an active wake state and network voltage is within the operating range.

What does U0155 mean?

This code typically indicates that the supervising controller has lost its digital handshake with the dashboard display. Real-world impacts include frozen gauges, darkened screens, or the failure of critical warning indicators to update. In certain vehicle architectures, this communication gap may prevent the engine from starting due to shared security verification paths.

System Faults

Diagnostic Reasoning

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