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		Ford Forums - Mustang Forum, Ford Trucks and Cars > Ford Cars and PAG Vehicles > Ford Contour \| Ford Mondeo \| Mercury Mystique \| Ford Telstar
System Too Lean

Ford Contour | Ford Mondeo | Mercury Mystique | Ford Telstar Forum for discussion of the Ford Contour, Ford Mondeo, Mercury Mystique and Ford Telstar

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09-14-2009, 17:24	#1 (permalink)
JKoffler44 Registered User Join Date: Sep 2009 Posts: 3	System Too Lean Hello. I have a 99 Contour V6 2.5L. Recently I got the codes P1131 (HO2S11 lack of switching, Bank 1) and P0171 (System Lean, Bank 1). I replaced my Bank 1 O2 sensor this past weekend and now have a pending code, P0174 (System Lean, Bank 2). Any ideas? Thanks!

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