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Replacing the Cat Sensors

Discussion in 'A3/S3/Sportback (8P Chassis)' started by jb0o, Aug 24, 2010.

  1. jb0o
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    jb0o North East Forum Moderator Regional Rep Site Sponsor VCDS Map User

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    [Aug 24, 2010]
    After my Cat Converter had collapsed I had it replaced and all was good, then the emissions light came on. Scanned the car and VCDS kicked up an error with the emissions... I suspected it was a sensor and my suspicions were confirmed when the car sailed through its MOT.

    Have just scanned the car again and 2 faults have appeared:

    17441 - Sensor for Nox (G295): Signal too Low
    P1033 - 002 - Lower Limit Exceeded - MIL ON
    18528 - Post-Catalyst Oxygen (Lambda) Sensor Correction; Bank 1: Too Lean
    P2096 - 002 - Lower Limit Exceeded - MIL ON


    So I'm guessing the sensors need to be replaced? How much would I be looking at?

    Thanks,
    Jonny
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  3. Dougster67
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    Dougster67 Member

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    [May 18, 2011]
    Hi Johnny.

    Did you get this problem sorted, i to have just changed my front cat, and now my engine management light has came up with the same faults as you. it would be interesting to find out if you got it sorted.

    Cheers
    Dougie
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  4. jb0o
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    jb0o North East Forum Moderator Regional Rep Site Sponsor VCDS Map User

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    [May 18, 2011]
    I haven't mate, have just been living with the light on, haha.

    Will start looking into it after my exams -- let me know if you do as well as its something that will need to be sorted eventually!
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  5. FranA3
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    FranA3 events moderator Regional Rep

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    [May 18, 2011]
    ive got exactly the same prob jonnny my cat went two years ago replaced it with a stainless one as at the time cats were stupid money for our cars something like £700 i got quoted as it was a main dealer only part got a stainless one for £230 fitted happy days and the exhaust light keeps coming on all the time i turn it back off but cant be bothered to turn it off now its been on now for about the past year lol i think its my front lamba sensor thats gone dont know how much they are yet i'll get round to it one day lol
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  6. jb0o
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    jb0o North East Forum Moderator Regional Rep Site Sponsor VCDS Map User

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    [May 18, 2011]
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  7. FranA3
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    FranA3 events moderator Regional Rep

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    [May 18, 2011]
    hahaha my car still runs fine and passed the mot fine so it can wait till i can be bothered to do it lol
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  8. jb0o
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    jb0o North East Forum Moderator Regional Rep Site Sponsor VCDS Map User

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    [May 18, 2011]
    Same haha. May even result in a bit of black tape over the light :)
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  9. FranA3
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    FranA3 events moderator Regional Rep

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    [May 18, 2011]
    hahaha i thought i was bad but glad im not alone with the being lazy with fixing the light lmao
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  10. Dougster67
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    Dougster67 Member

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    [Sep 2, 2011]
    Hi Johnny.
    Im getting fed up with the light on all the time, fuel consumption is getting worse and the cars sound rough, so i decided to order a Nox Sensor £380. Not cheap, the sensor is not in the country until next month, but will give you an update once its fitted.
    #9

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