I think the airbag light would be on all the time if you disconnected or removed the passenger side airbag - because each time you turn the key on, the airbag controller module runs through a self test. I doubt very much it would have any impact on the PCM running the engine or managing emissions. Dont they have annual inspections where you live? Where I live in VA, if the airbag light stays on, it wont pass the safety inspection; even if it does pass the emissions test in those counties that have the emissions requirement. I think its the same in TX - if the inspector bothers to look.