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Old Feb 26, 2009 | 04:04 PM
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Default O2 sims

I put headers on my car a couple months ago and put O2 sims in place of my rear O2s i was wondering if i need to keep them on for my car to run properly or just so my computer won't throw codes
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Old Feb 26, 2009 | 04:18 PM
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I'm pretty sure that the code for the REAR 02's will not affect performance, I could be wrong though.
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Old Feb 26, 2009 | 05:05 PM
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Ya that's what I was thinking too. I turned off the SES code for the rear O2's to never come but I didn't think that the rear O2's did anything except read the temp or somethin like that of the rear O2's
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Old Feb 26, 2009 | 05:11 PM
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code for rear o2's do NOT affect performance
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Old Feb 26, 2009 | 05:52 PM
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So even if I didn't have anything in place of rear o2's it would still run the same just would throw a code?
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Old Feb 26, 2009 | 05:54 PM
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Originally Posted by 99LS6SS
So even if I didn't have anything in place of rear o2's it would still run the same just would throw a code?
Yea, that was my understanding of it...
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Old Feb 26, 2009 | 06:00 PM
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Ya same here. Cuz I have the sims on my car sold I just haven't takin them off to ship them yet (sold them two days ago and go to work when it's dark and get home when it's dark, working outta state). I got to thinking after I had them sold to someone who already gave me if I actually needed them or not
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Old Feb 26, 2009 | 06:06 PM
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Originally Posted by 99LS6SS
So even if I didn't have anything in place of rear o2's it would still run the same just would throw a code?
yes, it will still run the same. i dont have cats and just removed my rear o2's and installed an oil drain plug in the bungs (18mm x 1.5 pitch). i bought the oil drain plugs frm advance auto. oil drain plugs are for a toyota

all rear o2's do is detect a malfunctioning cat. front o2's will affect performance, rears dont affect performance
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Old Feb 26, 2009 | 06:12 PM
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Alright thanks alot for clearin it up man.
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Old Feb 26, 2009 | 07:02 PM
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no prob bro, glad to help
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Old Feb 26, 2009 | 07:29 PM
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I had my rear 02s deleted and had them tuned out
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Old Feb 26, 2009 | 07:46 PM
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By tuned out you mean they went in and turned the code to never trip an SES light? Cuz if so I've already done this
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Old Feb 28, 2009 | 10:01 PM
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Yea....so you should be fine.....
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