o2 Sensor location
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This is a discussion on o2 Sensor location within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Ok i did search there is only one o2 sensor in out cars right ? the one by the stock ...

  1. #1
    Registered User rr1911's Avatar
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    o2 Sensor location

    Ok i did search

    there is only one o2 sensor in out cars right ?
    the one by the stock cat is the only one i know of, is that the only one ?
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  3. #2
    ODJ
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    There are 2 that I can name. There is the one just downstream of the stock DP, right before the cat (I guess that's the one you're talking about). There is also another one in the passenger side exhaust manifold, just before the UP. You can access this one through the right-front wheel well.

    At least that's the way it is in my '04 wagon. I gleaned this information when I used this thread to get me through all my exhaust installs.
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    Administrator RayfieldsWRX's Avatar
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    ^^^Correct, for the '02-'05 cars, at least. You wind up taking the manifold one out when doing the uppipe. I highly recommend an 02 socket if you're going to be working on it.
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  5. #4
    Registered User rr1911's Avatar
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    thanks

    does the STi have the 1 in the up-pipe ? i thought it didnt
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    Registered User wrx wagone's Avatar
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    Quote Originally Posted by rr1911 View Post
    does the STi have the 1 in the up-pipe ? i thought it didnt
    No WRX has an O2 sensor in the uppipe. 02-05 WRX has an EGT probe.
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  7. #6
    Registered User rr1911's Avatar
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    Quote Originally Posted by wrx wagone View Post
    No WRX has an O2 sensor in the uppipe. 02-05 WRX has an EGT probe.
    o
    so there is only 1 o2 sensor right ?
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    Registered User wrx wagone's Avatar
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    Quote Originally Posted by rr1911 View Post
    o
    so there is only 1 o2 sensor right ?
    Please reference post #2 of this thread.
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  9. #8
    Registered User rr1911's Avatar
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    Quote Originally Posted by wrx wagone View Post
    Please reference post #2 of this thread.
    ok thanks
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