Score one more for Unabomber.
If you get codes 41 and 42 on either a Forester or Impreza this would point to the yellow electrical connectors under the front seats of these cars(one code for each seat) there is a fix from Subaru, I can't remember but I think its a service bulletin, telling you to remove the wires out of the connectors and solder the terminals on to the wires then refit them back into new connectors, which should be supplied in a kit from Subaru. The kit costs about $20 or so from any Subaru parts store.Hope this helps out and is not to confusing??
When the airbag does its self check the light will go out.