If your Honda airbag light stays on all the time, it means the Supplemental Restraint System (SRS) has detected a problem with the airbag system.
When your Honda airbag system is functioning properly the airbag light comes on when you turn on the ignition but should turn off once you start the engine.
If a problem is detected by the airbag system you will see the airbag light stay on. In newer models a warning message will display on the dashboard stating "check airbag system".
Driving a Honda with the airbag light on increases the chances of serious injury if you get into an accident.
Common problems that can trigger Honda airbag light to come on.
Airbag system is comprised of a control unit, multiple sensors, seat-belt buckles, pretensioners and the airbags themselves. Any of these components can fail.
Basic code readers are not be able to diagnose or reset Honda airbag light.
In cases of faulty or broken SRS components, the faulty component will need to be replaced.
Be careful and install a good airbag.
Do not install an airbag that was removed from a Honda due to a recall.
Check if there is a recall related to the SRS for your particular Honda vehicle.
If the the fault is related to the recall, your Honda dealer will fix it free of charge even if the vehicle is out of warranty.
You are most likely are using a scanner that can not read fault codes from the airbag module. Most generic OBD2 scanner can't read Honda airbag codes. Here is a list of scanner that can read and clear Honda airbag fault codes.
On any 1996 and newer Honda that has OBD2 port under the dashboard. Including models such as