Exhaust emission warning lamp on.
You should get that looked at by a professional.
Thanks… i have not a clue.
The shop will plug a scan tool into your car to give them a clue. You could have this done, usually for free, at an auto parts store. The codes would give you a clue. Or you could post the codes here and we MIGHT be able to give you some ideas. Could be as simple as a loose or bad gas cap. Might be more extensive.