How to test the (DPFE) and (EGV) solnoid

1998 MERCURY MYSTIQUE
90,000 MILES
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RONSKI
  • MEMBER
  • 3 POSTS
1998 mercury mystique 2.5, V6 and where is the manifold port that needs to be clean out. Do I have to remove the manifold. I can't find a diagram for this cars egr route any where,I would like to know what it looks like so I can do tests from A to B. In other words,where do the hoses come from that attach to DPFE and soforth.When this gets all figured out,how do I rest, so the check engine light won't come back on. I'm getting P0401 code so I wont to go through everything and make sure my (DPFE) and (EGV) soleniod are good also. I know how to check egr valve. THANKS AGAIN!
Dec 2, 2011 at 4:14 PM
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ASEMASTER6371
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 52,796 POSTS
the dpfe is checked through a scan tool. it has a voltage change based upon load changes.

a bad cat can cause a dpfe failure as well from excessive back pressure. these checks are best left to a shop familiar with these types of repairs.

Roy
Dec 2, 2011 at 5:10 PM