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Downstream O2 Used Upstream?

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Old Nov 17, 2020 | 11:06 AM
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libertyforall1776's Avatar
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Question Downstream O2 Used Upstream?
On an '02 Camaro 3.8L, can I use a downstream O2 sensor in the upstream position? Is there any real differences between them and if so, what are the negatives?
 
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Old Nov 17, 2020 | 05:24 PM
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I'm pretty sure that it matters, at least on newer cars the one after the cat is a wideband o2 sensor and the one before the cat is a narrowband. I believe that on the f body's they used wideband and narrowband.
 
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Old Nov 17, 2020 | 05:26 PM
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If you do use a narrowband o2 sensor downstream then your I/M readiness for your o2 sensors and your cats wont set, your car also may not run right and you'll have a CEL.
 
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