at the top of the technical issues page there is a topic called "List of ALL OBD-II DTC Error Codes for GM" .... vehicleshttp://www.saturnspot.com/forum/viewtopic.php?t=14252
in the first post in that topic there is a link to.....
http://www.domesticracingconcepts.co...c_frameset.htm
on that site there is a thing that says....
DTC B0074 Supplemental Deployment Loop #1 Open
so assuming ur talking about a car with obd2 i would say thats what the problem is.... airbags......???