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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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