P0031 and possible AFR gauge install
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This is a discussion on P0031 and possible AFR gauge install within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Hello, My car has been popping a P0031 (Heater Circuit Low) and with a bit over 130000 miles I recognize ...

  1. #1
    Registered User coemgen's Avatar
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    P0031 and possible AFR gauge install

    Hello,

    My car has been popping a P0031 (Heater Circuit Low) and with a bit over 130000 miles I recognize that the front O2 sensor needs to be replaced. No problem.

    Of course everytime something dies on my car, I try to upgrade it. So I would like to do a wideband sensor with a gauge, and it makes sense to replace the front one since that is considered the AFR sensor, but it seems that people are useing the rear sensor for their wideband gauges. Am I correct when I read this?

    Doesn't it make more sense to measure this before the catalytic convertor rather than after?

    I love this forum, I find it incredibly helpful. I am hoping for a quick answer as my inspection sticker expired months ago, I need to fix this quick.

    Thanks!
    Kevin
    WRoXanne never has to put on the red light.

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    Registered User wrxlaunch's Avatar
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    You need your O2 sensor... It sends its signals/readings to the ecu. Widebands normally go in the down pipe/ after the turbo. Replace broken sensor with oem or equivalent.
    VF-43 Bugeye: OPEN SOURCE tune... 121xxx miles

    13.1@105... Lazy launch 1.9 60'
    285whp and 300WTQ.

  4. #3
    Moderator Donkey's Avatar
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    You cannot use an aftermarket wideband in place of the factory front sensor.
    Resident Adviser @ WTF Tuning, LLC
    2002 FORESTER S
    1998 FORESTER S




  5. #4
    Registered User coemgen's Avatar
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    Are you sure?

    http://www.aemelectronics.com/wideba...-gauge-kit-745

    This is listed as compatible for a 2002 WRX manual...

    I'd hate to have to cancel an eBay sale, but we shall see.

    Post #2? I am fully aware of my need for an O2 sensor
    WRoXanne never has to put on the red light.

  6. #5
    Good news, everyone! xxxxxxxAnub1s's Avatar
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    Quote Originally Posted by coemgen View Post
    http://www.aemelectronics.com/wideba...-gauge-kit-745

    This is listed as compatible for a 2002 WRX manual...

    I'd hate to have to cancel an eBay sale, but we shall see.

    Post #2? I am fully aware of my need for an O2 sensor
    To be fair, that guage will work in any vehicle with a gauge pod. You can't use a wideband O2 sensor in place of the stock O2 narrowband sensor. Your ECU will get the wrong readings or even unusable data from the wideband and so your fueling will be off.
    Cody
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    Your nighttime volunteer of near-useless information.
    Good news, everyone!

  7. #6
    Moderator Donkey's Avatar
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    Quote Originally Posted by coemgen View Post
    http://www.aemelectronics.com/wideba...-gauge-kit-745

    This is listed as compatible for a 2002 WRX manual...

    I'd hate to have to cancel an eBay sale, but we shall see.
    You are mistaken on how this works. Like Anub1s said,that gauge is no different than buying a boost gauge. It is a universal install.
    Resident Adviser @ WTF Tuning, LLC
    2002 FORESTER S
    1998 FORESTER S




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