How important is the rear o2 sensor?
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This is a discussion on How important is the rear o2 sensor? within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; So i put my new turbo in, but forgot to put the rear o2 sensor in, and it has been ...

  1. #1
    Registered User efmd3's Avatar
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    How important is the rear o2 sensor?

    So i put my new turbo in, but forgot to put the rear o2 sensor in, and it has been ground into a nub, do i need a new one or can i just plug that bish?

    PS when i'm running race fuel in a few months i can't have them in anyway, can i?

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  3. #2
    Registered User 68sprintb's Avatar
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    it's only used for the OBDII compliance to monitor the health of the cats, since it's ground into a nub and the PCM hasn't noticed yet (it should notice though) you may be fine, until you need to smog it. in the long run buying a new one is the best idea, it's just a boring regular O2 sensor so it shoudn't be too expensive.
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    Registered User hakira's Avatar
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    or you can just use that spot for a wbo2 and use your tuning software to tell it not to popup the code for the rear o2, since you have a bigger turbo i'm assuming you did this already
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    Quote Originally Posted by hakira View Post
    or you can just use that spot for a wbo2 and use your tuning software to tell it not to popup the code for the rear o2, since you have a bigger turbo i'm assuming you did this already
    +1

  6. #5
    Registered User efmd3's Avatar
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    Quote Originally Posted by hakira View Post
    or you can just use that spot for a wbo2 and use your tuning software to tell it not to popup the code for the rear o2, since you have a bigger turbo i'm assuming you did this already
    codes were killed long before the sensor, i wonder if i can find a longer cable to run the lc-1 to that spot so its further from the turbo...

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