Fault Code
 

http://www.dtcsearch.com/P0455/?from=Torque

Anything I should worry about? I've had it go off before, I think it might just be the fuel cap...

Probably...is the O-ring seal around your cap cracked or broken? What year is your ram?

It's a 2001 and the seal was rounded off and very hard (no pun intended) I went ahead and got a new gas cap, went to Advanced Auto and got one for $12. Put it on, reset the PCM and it's doing good. I did think of something earlier though that makes sense, every now and then when I start it up cold, while idling, you can hear a very big air leak. Well I'm wondering if it wasn't because of the faulty gas cap and air was getting sucked in through there. Guess I'll see in the morning when I go to school.

My seal on my cap is cracked in a bunch of places... I need to buy a new one myself.

Well started it up this morning and had no air leak! Guess it fixed the problem.

And here is some pictures of the caps

Old:
http://i887.photobucket.com/albums/a...-12-22_465.jpg

New:
http://i887.photobucket.com/albums/a...2-12-27_66.jpg

At least it was something simple. Congrats on an easy fix.