Okay, I've attempted to read the warranty wording contained in this thread but I have a more specific question. My 2000 Mountaineer has a CEL on and the code is P1400 (or is that P4100) which I have found means DPFE (differential pressure feedback egr sensor) voltage low. Anyone know if this is one of the "certain" 8/80 parts. Plus, Michigan doesn't require emissions test and I'm not aware that I'm required to fix it so perhaps 8/80 doesn't apply?
