Originally Posted by CavScout97
DPFE Differential Pressure Flow EGR Sensor. EGR Exhaust Gas Recirculation Valve. Have the same code on my 03 FX4 5.4L. From what I've read on here if you aren't noticing any issues with your truck it's just the dpfe sensor and not your actual EGR valve. Seems to be an easy fix if you can find it. I still have no clue where mine is but I've put about 2000 miles on my truck since I got that code with no adverse effects
I have this same issue in my '01...although I haven't really had the recent time to fix this.. but I agree, I think it's the DPFE sensor...which mine is located on the drivers side of the engine, back towards the fire wall. It looks like a square chip with two small pipes that run vertically down to the exhaust... hope that helps.