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2001 Ford F-150 Wont pass smog

Tiny
BRIANA003
  • MEMBER
  • 2001 FORD F-150
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 10,300 MILES
I've had a trouble code P0401 coming up for months I took it to a well known auto repair chain, they changed the EGR, still have code, took it in 3 more times, told me they couldn't figure it out, but the last time they said I need to change the oxygen sensor. I still have the same code coming up.
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Wednesday, March 25th, 2009 AT 6:01 PM

1 Reply

Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
The DPFE sensor may be faulty and need replacement.

Also the egr valve and ports could be pluugged up with carbon and need cleaning.

The last things I theres not enough vaccum goign to the egr valve diaphragm to open it.
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Wednesday, March 25th, 2009 AT 9:36 PM

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