The fuel pump and filter were just replaced. When I left the dealership, I noticed that the airbag light near the speedometer was staying on. By the time I drove back to the dealership, it had gone off. It has been on intermittently since then. The day after I picked it up, there was a slight hesitation when I started it the first time, but then it started fine. The next morning, it would turn over fine but would not start. My husband checked the battery and said it was ok. Now it won't even turn over. If we jump start it, it runs without problem, but sometimes won't start and then sometimes it will. He has charged the battery overnight with a trickle charger and said the cells were good. What else could be going on?