2000 Ford Aerostar ENgine Code

Tiny
ECP
  • MEMBER
  • 2000 FORD AEROSTAR
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 90,000 MILES
The check engine light came on. When the code was read it say Bank 1 and 2 are too lean. What could cause this?
Saturday, March 14th, 2009 AT 7:09 PM

1 Reply

Tiny
FORDTECH1966
  • MEMBER
  • 3 POSTS
I suspect you have a PO171 and PO174. There is a technical service bulliten on this issue. The codes are caused by a vacuum leak internally. The bullitin calls for replacement of the upper and lower intake gaskets, thefuel pressure regulator hose, and possibly the front valve cover.
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Saturday, March 14th, 2009 AT 7:23 PM

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