Diagnostic Code P1151

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05-18-2007 | 06:09 PM

stage2roush2002

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Roush #6147

Joined: Mar 2006

Posts: 497

From: Dallas, Tx

Diagnostic Code P1151

P1151 Lack of HO2S21 switch - sensor indicates lean

Can anyone explain this?

05-18-2007 | 08:49 PM

v6'stang

Senior Member

Joined: Mar 2005

Posts: 1,030

From: FL

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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