2002 Lincoln LS Repair Question
first, i would verify both vacuum and exhaust are present at the egr valve. if one is missing, it needs to be repaired.
did you mean the dpfe sensor?? this is a common failure.
does the solenoid work? and if it does, does it pass vacuum and open the valve??
there is a lot to this system and you need some help from a shop. throwing parts at it is expensive and most likely wrong.
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