Changed the plugs & both O2 sensors

Tiny
ANONYMOUS
  • 2003 FORD WINDSTAR
  • 182,000 MILES

Changed the plugs & both o2 sensors. Still giving codes po171 &174, it also stumbles during acceleration (bogs down). Gas filter has been changed.

Sunday, January 20th, 2013 AT 2:13 PM

1 Reply

Tiny
ASEMASTER6371
  • EXPERT
  • 25,533 POSTS

O2 sensors are not the issue.

Low fuel pressure, vacuum leaks, mass air flow sensor or pcv valve are the reasons for these codes.

Roy

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Sunday, January 20th, 2013 AT 2:15 PM

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