The MIL light came on and the vehicles engine is running very rough. on 2010 Jeep Patriot

Vehicle was filled about a 100 miles ago and gas cap was checked.

Asked by for the 2010 Jeep Patriot
most likely a missfire code. have the properly diaged, not a free code pull and get a bid. if you wait too long you may damage the cat converter and add a lot to your repair cost.