Any body else have this problem? I filled my tank up 3/4 and drove for about two days, when all of a sudden my check engine light came on. I got a little pissed because this car is supposed to be pristine. But then I remembered something I read about gas caps being loose can do this. So I pulled over and checked, it was tight. I figured it cant hurt so I loosened the cap and A-LOT of pressure came out. Re-tightened, got back in the car and the light went out. Go figure.