Cherokee with check Engine light on

I have a 1993 Cherokee and the light of the check Engine was lit and I don't know what can be due. You can give me some indication to review this topic. Thank you

Hello everyone, Juliomol to make an accurate diagnosis of the problem detected (light check on), you must perform the self -diagnosis to be able to isolate the failure. You can do it without a scanner in that system. Using the Jeep's contact key and the check's own check. You must count the flashes of this and write them down. They are codes of 2 figures, separated by pauses to the witness of the witness ... Ex 22, 45 etc .., in the net there are many tutorials about it and the code tables, to know what they mean ... if you have doubts write to us. Greetings to all.

Thanks for the answer. If I still need help, I warn you. Greetings