I tried to do a search, but all I got was 6 pages of this forum.

My check engine light came on while idling. This is the second time it has happened in a month. The first time happened right after I refueled the car. I thought that I did not tighten the gas cap enough and disregarded it. The light did not reset itslef as the manual stated. So, I disconnnected the battery and all was fine until today. The light came on again, and then the car began idling hard. The car did not drive smoothly either.