Well my check engine light came on. I was starting to think the bulb was bad as I don't think I've ever seen it on this truck before lol
Anyways, the code that it pulled was for the EGR Pressure Sensor. Just a tiny little plastic thing. Shouldn't be a big deal to replace, but I am Irish. And there's no luck involved there.
Does anyone know where this thing is on the motor? The guy at the auto parts store didn't have a clue. Maybe a picture if you guys have one?
Thanks!

Just wanted to mention, The sensor I bought has two vacuum lines that connect to it and a small electrical connector on the side. If that helps you guys. The code I'm pulling is P1400 I believe. Doesn't seem like it makes the truck run any different, but I'd like to try and replace this little guy on my day off and see if that fixes the issue. I read another post about it possible being the "DPFM"? Help me out here guys.

 

It sounds like you're describing a DPFE sensor. On my 2011 it's located on the driver side of the engine. I just did google search for 2001 SOHC 4.0 and it appears to be in a similar location.

 

Yup that appears to be the culprit. I see where it's at. Thank you sir!