B1188 The gauge control module lost communication with the multiplex integrated control unit
What does B1188 mean on a Honda?
B1188. The gauge control module lost communication with the multiplex integrated control unit. Body status messages may not reach the instrument cluster. This Honda-enhanced code applies to Honda and Acura models that use this code.
Common causes of B1188
- Faulty multiplex integrated control unit
- Faulty gauge control module
- Gauge control module harness is open or shorted
- Gauge control module circuit poor electrical connection
- Corroded or loose connector pins on the data link
How to fix B1188
- Confirm the code with a scan tool and check every module on the system for related faults
- Inspect the connectors at both ends of the data link for corrosion, moisture, and loose pins
- Test the data link wiring for opens and shorts with a multimeter
- Repair any damaged wiring or connector before replacing a module
- Replace the gauge control module that fails testing, then clear codes and retest
Sources and review
- Last updated 2026-09-29.