Code Definition

B1155 — Gauge Control Module Lost Communication with the MICU

System: Body  |  Type: Manufacturer-Specific  |  Make: Honda

About B1155

B1155 is a manufacturer-specific body diagnostic trouble code recorded for Honda vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

B1155 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The Instrument Cluster, known on Honda platforms as the Gauge Control Module, continuously monitors the multiplex data network for periodic messages sent by the Multiplex Integrated Control Unit (MICU), which is Honda's term for the Body Control Module. The MICU provides the cluster with information such as door status, lamp state, key position, and various body signal inputs that the cluster uses to drive warning lamps and indicators. DTC B1155 is logged when the cluster fails to receive valid MICU messages within the expected timeout period (typically 1 to 2 seconds) during key on or engine ...

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