What causes B1150 on a Honda?

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) Water intrusion or corrosion inside the module

How do I fix B1150 on a Honda?

Confirm the code with a scan tool and check the gauge control module fuses Inspect the gauge control module connectors and grounds for corrosion and looseness Test battery voltage and charging to rule out low voltage Check around the module for water intrusion Replace the gauge control module only after tests prove it failed

B1150 The multiplex integrated control unit found a fault in the gauge control module

Q: What does B1150 mean on a Honda?

B1150. The multiplex integrated control unit found a fault in the gauge control module. The instrument cluster may act up or lose readouts. Applies to Honda and Acura models that use this code.

Category: Body
Severity: Body Warning Light
Applies to: Honda and Acura models that use this code

What does B1150 mean on a Honda?

B1150. The multiplex integrated control unit found a fault in the gauge control module. The instrument cluster may act up or lose readouts. This Honda-enhanced code applies to Honda and Acura models that use this code.

Common causes of B1150

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)
Water intrusion or corrosion inside the module

How to fix B1150

Confirm the code with a scan tool and check the gauge control module fuses
Inspect the gauge control module connectors and grounds for corrosion and looseness
Test battery voltage and charging to rule out low voltage
Check around the module for water intrusion
Replace the gauge control module only after tests prove it failed

Sources and review

Last updated 2026-09-26.