B1157 The gauge control module lost communication with the multiplex integrated control unit

What does B1157 mean on a Honda?

B1157. The gauge control module lost communication with the multiplex integrated control unit. The cluster may lose body status messages. This Honda-enhanced code applies to Honda and Acura models that use this code.

Common causes of B1157

• Faulty Gauge Control Module
• Gauge Control Module harness is open or shorted
• Gauge Control Module circuit poor electrical connection
• Faulty Multiplex Integrated Control Unit (MICU)
• Corroded or loose connector pins on the data link

How to fix B1157

1. Confirm the code with a scan tool and check every module on the system for related faults
2. Inspect the connectors at both ends of the data link for corrosion, moisture, and loose pins
3. Test the data link wiring for opens and shorts with a multimeter
4. Repair any damaged wiring or connector before replacing a module
5. Replace the gauge control module that fails testing, then clear codes and retest

Sources and review

• Last updated 2026-09-26.