Q: Drove off lot, filled up, and the check engine light came on. Gas cap says if it not put on tight, this light may come on...is this true? owners manual on order, trying not to have to take it back already...
A: Check engine could be just about ANYTHING related to emission. Go back and either have THEM scan it - or take it to autozone and they will scan it for you (free). Then come back and ask more questions with the exact engine code. Good Luck...