The light on the dash that indicates the passenger seat airbag is off when the seat is empty is no longer illuminated in my car. When it first turned off, it came back on for a few minutes two different times the first day, but then never illuminated again. After a month or so, I had the dealer look at it during routine service and they could not find a problem or error code. They said "maybe it's not supposed to be lit" (so it was broken since July 2013 because it has always been illuminated before this?!?!). They told me that having a map in the pocket on the back of the seat was probably causing the system to think there was a passenger, even though the map weighs a few ounces and has been there the entire time I've had the car. After they fiddled with it, it still didn't work for the first 50ish miles after getting my car back, but then it suddenly turned on again for 3 days, then turned off and has stayed off for 4 weeks since then. My concern is that I don't know if it's a light problem, a loose wire somewhere, or an airbag problem... since no error codes are showing, how do I know if my airbag works on the passenger side? Anybody else had this problem? What was the cause and what was the fix? (I have a 2013 SE with around 115,000 miles.)