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Replaced the EGR and the ruff idle and P401 code came back.


2006GrayXLT

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2006 Explorer XLT
Hey guys I replaced the EGR and the p0401 came back on the car after a few days. It also has a ruff idle.. I got the EGR from Advance Auto Parts. Could it be defective? Any other ideas? Thanks for the help.
 




2006GrayXLT

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Sorry

2006 4.0 4x4 185k
 




JAWIT

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I had the same problem and bought an EGR from advance. When I swapped it for a Motorcraft part, the code went away.
 




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