Ford Repair: help as soon as possible, ford explorer xls, ford explorer

Question
I've ford explorer XLS 1999 and start appear on the control panel CHECK ENGINE , I tried disconect the battery and conect again but few days appear again,can you give me an explanation about this. I'll be thank you. sincerely.

Answer
James-

  There's no way to know what the problem tripping the light is without hooking it up to a code reader.  A lot of parts stores will do this for you for free.  Any shop could also do it, but they'll likely charge $60-$80.  Hope this helps.

Steve