o2 sensor

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Nov 23, 2004 | 09:54 AM

dylokjai

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Joined: Sep 2004

Posts: 302

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From: Los Angeles, CA

o2 sensor

newbie question......i know for a 99si it has 2 o2 sensors one of them is on or by the CAT wheres the other one???

Nov 23, 2004 | 09:56 AM

pdiggitydogg

Honda-Tech Member

Joined: Feb 2003

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From: Beware Of Perverts

in the header, right before the cat

Nov 23, 2004 | 09:57 AM

wootcivic

Joined: Feb 2004

Posts: 61

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From: Chicago, IL, USA

Re: o2 sensor (dylokjai)

Might want to take a look at the Header and the cat. However, my setup has both on the header itself.. Dunno if thats correct or not, but the last o2 is b4 the cat...

Hope it helps

Nov 23, 2004 | 11:11 AM

exare250

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Joined: Oct 2004

Posts: 153

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From: akron, oh, usa

Re: o2 sensor (dylokjai)

yes your secondary o2 sensor is either after the cat or in the cat. your probibly having trouble seeing your primary o2 sensor because you may still have the stock heat shield on the header.