Quote:
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Originally Posted by shorod
Try a search on the Taurus forum for keyword "P0402." There are a few posts related to this code. You'll likely find you have a bad DPFE sensor, which is quite common.
-Rod
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After troubleshooting the egr system and components I determined it was indeed the DPFE. The old one has the aluminum housing the the signal port was corroded... almost completly plugged. Replaced it and my car is now good as new.
Thanks all for the suggestions!