During my road trip these past couple days I noticed the "service engine soon" light came on. There were no explosions, violent grinding noises, or anything like that, the light just came on. Upon reading the owners manual, I learned that this could be caused by a loose fuel filler cap, and that if you tighten the cap, the light should go out after "A few driving trips".
So how long is that? I've went through 2 tanks of gas since that and the light is still on. Has anyone else had this happen? If so, how long before the light went out?