I have a question, I just bought a 2014 Kia Forte EX with 59800 miles it run great, I have had it a week now and the car ran a scan while i was driving and gave me a check engine light and it said"Engine Control System" Possible engine issue.It runs normal gas mileage is fine. I did just fill up with gas yesterday so when I got to work I reset the gas cap. Yesterday I did notice a slight rough idle. Can it be It just needs a tune up??? I don't have any warranty and it has me scared to death!!!