Incase of accidents,
the airbag should still deploy as this is controlled by the sensor impact to the ECU.
The codes on the cluster is just verify that the ecu is matched to all coded parts, and the cluster lights are just indicators.
though - when your due for a RWC or pink slip etc, the inspectors may fail you due to this.
also if you ever get pulled over for defects or cops. if they see this, it will be a defect for sure.
if you cannot get the codes reset or fixed via honda dealer - then you can do a retro fit/soldering to make it flash on and off. - PM me for further details.