What causes B1187 on a Honda?

Faulty SRS airbag 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 do I fix B1187 on a Honda?

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

B1187 The gauge control module lost communication with the SRS airbag unit

Q: What does B1187 mean on a Honda?

B1187. The gauge control module lost communication with the SRS airbag unit. The cluster may not show airbag status and the SRS light can come on. Applies to Honda and Acura models that use this code.

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

What does B1187 mean on a Honda?

B1187. The gauge control module lost communication with the SRS airbag unit. The cluster may not show airbag status and the SRS light can come on. This Honda-enhanced code applies to Honda and Acura models that use this code.

Common causes of B1187

Faulty SRS airbag 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 B1187

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.