Well-- after three days in the shop, my car came back with a new
passenger seat SRS sensor, a new driver's side seat frame, and a very nice car wash. The problem is that the check engine light came on again after about 100 miles. This is the reason the car went to the shop in the first place. The report from the dealer was that nothing wrong could be found. Jim suggested the air-mass sensor, a test of which I'm assuming would reveal a flaw.
I guess the question I have is if this warning light comes on, and no difference in the operation of the car is noticed and the source can't be found at the dealership, why have it at all?
Also, if this light is an indicator of a loose fuel cap, it could just as easily display "check your fuel cap"
Steve