I just bought my car a few days ago and the passenger side airbag goes off and beeps constantly. I took it back to the dealership and they told me to bring it in when it happens. But each episode lasts a few minutes at a time, so, that's impossible. They scanned the seat and said it was fine, but, it is still beeping. I think it's the airbag sensor is off, but, they won't help me. Any advice? Is this common?