Few days back, I filled up gas tank of my Honda Civic 2006 and might forgot to tighten the fuel cap. After I stopped my car and again started it, it showed me error “Check Fuel Cap”. I was worried and tightened the fuel cap with one click sound but this error message did not go away. I read the manual of the car for this error and it came out that this error will remain for 2-3 days and it will go off automatically. Of course now its gone!!!