Check engine light on a 2000 GT

[GITY UUP]

By the way the weirdest thing happened to me after I wrote this post, my check engine light went off on my way home from work. I stopped at the gas station to fill up as I had less than an eighth of a tank left. The light then came on again when I pulled out of the gas station. I was reading in the manual that the check engine light will come on if the gas cap isn't "clicked" all the way to the right. The manual also mentioned something about not running 93 octane which is all I have been running since it was new. It claimed to try and run 87 octane for 3 tankfuls and the check engine light may go off so now the next few times I fill up I will run 87 octane. It's funny, my 88 5.0 when it was stock, hated 87 octane and would ping like all get out.

I'll try your solution StoplightWarrior and I'll let you know how it works. Thanks for the tip and the link to the codes.