emission control system malfunction on 2004 Kia Sorento

the emission control system of our car is malfunctioning. the light indicator is on.

Asked by for the 2004 Kia Sorento
Our check engine light went on in our 2004 Kia Sorento. Turned out to be a misfire of the 4th cylinder. Mechanic reset the light, hasn't come on since. I believe you can go to Advanced Auto and they have a code reader there. Try to find an honest mechanic. Best of luck!
2 more answers
This could be for a variety of reasons, as the emission control system is very complex. Take a look at RepairPal's article on the Check Engine Light and emissions control:

You will most likely need a professional diagnosis.
emission control system light indicator is on.