Rear o2 sensor problem
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This is a discussion on Rear o2 sensor problem within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; Okay, so I was putting an Invidia Catless DP in and of course I had to remove the stock downpipe. ...

  1. #1
    Registered User Hobbitrabbit's Avatar
    Join Date
    Jan 2014

    Rear o2 sensor problem

    Okay, so I was putting an Invidia Catless DP in and of course I had to remove the stock downpipe. The o2 sensor was rusted in and despite 2 days of trying to remove it with a blowtorch, tons of PB Blaster, o2 socket set, giant wrench, torque wrench, etc, it would not come out. I was advised to cut the wire and simply let the protune I'm having get rid of the CEL. Is this an acceptable alternative or should I buy a replacement?

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  3. #2
    Registered User wreckingball man's Avatar
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    Jul 2012
    Rocky Top
    If you absolutely can't remove it, I wouldn't cut the wire. But rather just unplug it. If it just monitors the cats then Its not needed if your getting a tune. I know on my car its just there to monitor cat efficient.

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  4. #3
    Moderator Donkey's Avatar
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    Apr 2005
    Da boonies
    I Support ClubWRX
    What vehicle? Any of the DBW/32 ECU vehicles need to keep the rear O2 operational due to the fact they do impact fueling and are not just for monitoring catalyst efficiency.
    Last edited by Donkey; 05-08-2014 at 07:01 AM.
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  5. #4
    Pro Manscaper Mikie13's Avatar
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    Oct 2006
    Palmyra, NJ
    Yeah just unplug it...find a new one on ebay, classifieds or whatever for $30, and use that.
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  6. #5
    Subaru Newb MainFrame's Avatar
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    Sep 2002
    Texas, United States
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    Like Donkey was saying, it depends on what car you have.. can't give advice without that info.

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