What causes B1155 on a Honda?

Faulty combination switch control unit Faulty gauge control module Open or short in the gauge control module harness Poor electrical connection in the gauge control module circuit Corroded or loose pins on the data link

How do I fix B1155 on a Honda?

Confirm the code and check every module for related faults Inspect the data link connectors at both ends for corrosion and loose pins Test the data link wiring for opens and shorts Repair damaged wiring or connectors before replacing a module Replace the gauge control module that fails testing Clear the code and retest

B1155 The gauge control module lost communication with the combination switch control unit

Q: What does B1155 mean on a Honda?

B1155. The gauge control module lost communication with the combination switch control unit. Headlight switch messages may not reach the cluster. Applies to Honda and Acura models that use this code.

Category: Network Communications
Severity: Check Engine Light
Applies to: Honda and Acura models that use this code

What does B1155 mean on a Honda?

B1155. The gauge control module lost communication with the combination switch control unit. Headlight switch messages may not reach the cluster. This Honda-enhanced code applies to Honda and Acura models that use this code.

Common causes of B1155

Faulty combination switch control unit
Faulty gauge control module
Open or short in the gauge control module harness
Poor electrical connection in the gauge control module circuit
Corroded or loose pins on the data link

How to fix B1155

Confirm the code and check every module for related faults
Inspect the data link connectors at both ends for corrosion and loose pins
Test the data link wiring for opens and shorts
Repair damaged wiring or connectors before replacing a module
Replace the gauge control module that fails testing
Clear the code and retest

Sources and review

Last updated 2026-10-10.