What causes B1200 on a Honda?

Faulty audio and HVAC display module Audio and HVAC display module harness is open or shorted Audio and HVAC display module circuit poor electrical connection Faulty MICU Corroded or loose connector pins on the data link

How do I fix B1200 on a Honda?

Confirm the code with a scan tool and check every module on the system for related faults Inspect the display module connectors 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 audio and HVAC display module that fails testing, then clear codes and retest

B1200 The MICU found a fault in the audio and HVAC display module

Q: What does B1200 mean on a Honda?

B1200. The MICU found a fault in the audio and HVAC display module. The display may go blank and the audio or climate controls may stop responding. 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 B1200 mean on a Honda?

B1200. The MICU found a fault in the audio and HVAC display module. The display may go blank and the audio or climate controls may stop responding. This Honda-enhanced code applies to Honda and Acura models that use this code.

Common causes of B1200

Faulty audio and HVAC display module
Audio and HVAC display module harness is open or shorted
Audio and HVAC display module circuit poor electrical connection
Faulty MICU
Corroded or loose connector pins on the data link

How to fix B1200

Confirm the code with a scan tool and check every module on the system for related faults
Inspect the display module connectors 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 audio and HVAC display module that fails testing, then clear codes and retest

Sources and review

Last updated 2026-09-29.