Originally posted by BSOELMAN:
one more note if your dpfe sensor is in a metal case, replace it as it is most likely the original. the new one you get should be an updated plastic design.
I just replaced my DPFE last night, as my 96SE threw simultaneous P0401 and P0402 codes (Excessive and Insufficent EGR flows  ). I regularly clean the EGR ports in the intake manifold, but double-checked the operation of the EGR valve -- it worked fine. Everything pointed to the DPFE being bad (it was the original one with almost 113K miles on it!). I snapped a picture of the original metal DPFE and the replacement Borg-Warner plastic DPFE (O'Reilly's for $53; lifetime warranty):
1996 Ford Contour SE (Mine): V-6 MTX/DMD/MSDS/K&N3530/Torsen/Spec-1/Split-Exhaust/Walbro/Syncromax..119K
2003 GMC Yukon XL SLT (Hers): 285HP/Stock..93K
| 
