Code Definition

B1008 — Multiplex integrated control unit communication with gauge control module lost

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

About B1008

B1008 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.

B1008 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 Honda Multiplex Integrated Control Unit (MICU) acts as the central body electronics hub, communicating with multiple subsystem modules over the vehicle's multiplex serial data network. DTC B1008 is set when the MICU detects a loss of communication with the Gauge Control Module, which is the processor within the instrument cluster responsible for driving the speedometer, tachometer, fuel gauge, temperature gauge, and all warning indicator lamps. The MICU relays critical vehicle status data to the Gauge Control Module over the multiplex link, and the module uses this data to update the instr...

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