Ford Repair: I need to know where this is located, mechanic work, dpfe

Question
Hello.  My check engine light has been coming on, so I took it to AutoZone for a diagnostic test.  Two things came back 31 and 34 (which are contradictory according to the book)... so he said that the problem was probably the "DPFE/EGR Valve Pressure Sensor" was defective or the something around it. What is your opinion?  And if it is the part, I need to know where it is located that way my fiancee who does all my mechanic work on my car can fix it.  Thank you!  

Answer
DPFE stands for Delta Pressure Feedback EGR and it is a small sensor attached to the EGR tube.  It has 2 small hoses attached to it and one wire connector that you can unplug. It's in a different location depending on the year and model, so I'll need to know that if you want an exact location.  It will either be a dull silver or black plastic.  These sensors do go bad a lot but they are usually very easy to replace.  Good luck,
Jason