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Code P1401 and P140...
 
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Code P1401 and P1409 Came up when I got emissions tested. No Check engine light on

  

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Have a 2000 Mercury Sable that I took to get the emissions tested and it had no check engine light on. Was told that it failed with P1401 and P1409. How do I fix those to get it to pass?


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Can I replacing the DPFE assembly places like AutoZone sell it


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