If your check engine light is on/lashing your vehicles computer has code(s) stored. If you don't have access to a scanner/code reader most local auto parts have a tool loaner program and can rent you one.Below I've attached a tutorial showing what is involved for retrieving codes.
After you perform this you can get back to us with the code numbers and we can help diagnose your vehicles problem properly.Hope this helps and thanks for using 2CarPros.