The other day I was topping off my coolant and happened to notice that there was some sort of sensor unplugged. I hadn't noticed it before because it was hidden under the shroud that says 6.0 Powerstroke.

I have looked all over and believe it was the Electronic Throttle Control motor but am not 100% sure. I just want to figure out what it was that was unplugged and the ramifications, if any, of it being unplugged. This isn't an actual picture of my particular engine but the little light blue plug is the one that I found unplugged. I had my EGR worked on several months ago and think the mechanic may have forgotten to plug it in afterwards. Any help would be greatly appreciated! Thank you in advance.

http://www.thedieselstop.com/forums/...867-large-.jpg