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Thread: CEL P2246 - Help!

  1. #1
    slice90 is offline New Member
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    Default CEL P2246 - Help!

    Hey guys,

    New to the mps scene.

    Recently installed a Cpe dumppipe (with cat) and autotech hpfp internals into my 2011 MS3.

    I had to replace both o2 sensors during install of the dump. Im currently running a Cobb stage 2 OTS.

    I now have a P2246 ''front HO2S sensor reference voltage circuit high input' which continues to re-appear after clearing...

    Car seems to run fine... Any help, suggestions or anyone who can fix it would be greatly appreciated!
    Last edited by slice90; 02-08-2016 at 09:50 PM.

  2. #2
    kiwi's Avatar
    kiwi is offline Senior Member
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    custom tune!! from purple drank,freektune etc

  3. #3
    slice90 is offline New Member
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    I contacted Ryan from PD, told me id have to resolve the CEL before a tune..... i was hoping a custom tune would fix it

    Wiring looks fine, sensor is new also....

  4. #4
    Lachlan's Avatar
    Lachlan is offline FWD: enthusiasm>aptitude
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    Oem sensor?

    Sent from my Nexus 6 using Tapatalk

  5. #5
    slice90 is offline New Member
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    I didnt use oem sensors....

    The secondary sensor didnt throw a cel (which i hear is more common due to the increased flow) so i'd assume the primary is also okay......

    Is using an oem sensor mandatory?

  6. #6
    Lachlan's Avatar
    Lachlan is offline FWD: enthusiasm>aptitude
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    No idea, but this thread suggests there can be problems with some non-oem ones CEL with CP-e downpipe

    Doesn't look like a common cel (yeah, 2nd o2 cels are super common). Since its pre-cat, it sounds like an actual problem with the sensor than with the downpipe. All the trouble shooting I can see is about checking wiring of the sensor (e.g. https://euroesi.mazda.co.jp/esicont/...2b7813300.html) and since they were replaced, that is where I would start.

    Sent from my Nexus 6 using Tapatalk
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  7. #7
    slice90 is offline New Member
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    UPDATE: cel fixed. Swapped aftermarket primary 02 sensor with an OEM sensor. Code cleared. Thanks for your help guys!

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