2000 Ford Aerostar ENgine Code

2000 FORD AEROSTAR
90,000 MILES • 6 CYL • FWD • AUTOMATIC
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ECP
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The check engine light came on. When the code was read it say Bank 1 and 2 are too lean. What could cause this?
Mar 14, 2009 at 7:09 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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FORDTECH1966
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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.
Mar 14, 2009 at 7:23 PM