In the past two weeks my Check Engine Light has come on. Last time it was on for about three hours and went off only to come on again last night. Still on when I came in to work. Bronco has 102000 miles so might be an O2 sensor. Any ideas? Will Autozone pull codes for OBDII Bronco is 96 5.8? Any obvious checks?

 

I've heard that many parts stores now pull OBD-II codes free, including the zone...

 

Autozone will pull the codes for free. However, I went about two weeks ago and had them pull the codes on my 96 5.0. they told me it was my gas cap. Took it to the ford place saturday to get them to see what was wrong with it. It turned out to be the egr valve. check engine light is now off, and running like a top.