I have a 2001 Explorer Sport 4x4, v-6 4.0 L. My check engin light came on about a week or so ago and i pulled the codes, the codes i got were p0401, and p1401. Best i can tell by looking around, its either a dpfe sensor thing or my EGR valve. Does this sound like im on the right track to you experts out there? Any help is greatly appreciated. Thank you.