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Resolved Wideband O2 sensor placement

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BLACK'98DSM

Moderator
5,473
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Feb 9, 2019
Alabama
Simple question today:

Should I put a wideband O2 sensor before or after the cat? I'm assuming before to get an accurate reading, and since the one after is to check that the cat still works...
 
I have my Innovate in the stock location, no heat sink, no problems. But before the cat FOR SURE.
 
Ideally before any flexi as well as they can leak over time, i have mine where it bends after the oil pan before the flexi and its close enough to read accurate and far enough away for it to last as i have had the same sensor for years Near 5 or 6 years now
 
Read the instructions that come with your kit, is it an Innovate, AEM or what?
Not yet purchased. I am searching for as much info as possible before buying, as I do with everything else.
I have my Innovate in the stock location, no heat sink, no problems. But before the cat FOR SURE.
Thanks Marty, that's what I thought.
 
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