Mustang Boards - Diagnostic Code P1151

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stage2roush2002

05-18-2007 05:09 PM

Diagnostic Code P1151

P1151 Lack of HO2S21 switch - sensor indicates lean

Can anyone explain this?

v6'stang

05-18-2007 07:49 PM

engine's running lean...your a/f ratio is off...maybe? i've heard ppl on here saying exhauste leaks can cause that. or a dirty/oily maf. (that's if that code means its running lean)

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