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S3 Bam post cat lambda sensor (S2) help

mattyboy199 Feb 11, 2013

  1. mattyboy199

    mattyboy199 Well-Known Member

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    My S3 has thrown up a sensor 2 fault (as below). So i intend to replace it, however i've been digging around on ebay & the bosch website. The Audi part number is 06A906262BB however the bosch website indciates 3 different sensors but does not indicate which sensor is post or pre. Has anyone had to replace this ? i'm pretty sure the same sensor is used on a number of cars & you shouldnt need to pay the £100 odd through a dealer.


    Chassis Type: 8L - Audi A3/S3
    Scan: 01,02,03,08,15,16,17,22,35,37,45,55,56,57,75,76

    -------------------------------------------------------------------------------
    Address 01: Engine Labels: Redir Fail!
    Controller: 8N0 906 018 BH
    Component: 1.8L R4/5VT 01 0001
    Coding: 10710
    Shop #: WSC 00000
    VCID: 78836BE34BCB

    2 Faults Found:
    17522 - Oxygen (Lambda) Sensor; B1 S2: Internal Resistance too High
    P1114 - 35-10 - - - Intermittent
    17704 - Shareware Version. To Decode all DTCs
    P1296 - 35-00 - Please Register/Activate
    Readiness: 0000 0000

    cheers

    matt
     
  2. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow... Staff Member Moderator Audi S3

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    This is post cat sensor and is narrow band... this is not the wideband pre cat sensor at the top of the DP...

    Can't help on part numbers sorry..

    <tuffty/>
     
    Last edited: Feb 11, 2013
  3. Scullies

    Scullies Well-Known Member

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  4. mattyboy199

    mattyboy199 Well-Known Member

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    i'm confused....

    This lists the 4 wire but without the plug ? it refers to the part off ETKA 06A906262BB
    Lambda Sensor LC8335

    This lists the 4 wire with plug for the rear
    Lambda Sensor LP40320

    ETKA states the audi part number ending BB as behind the cat
     
  5. Scullies

    Scullies Well-Known Member

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    get the one with the plug, you dont want to waste time trying to solder and seal wire joints.
     
  6. mattyboy199

    mattyboy199 Well-Known Member

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    oh yeah i'll defo go plug just need to check all the wiring is good. Tuffty has really confued me with his post S2 is sensor 2 post cat, why would the post cat sensor be at the top of the down pipe ? its after the cat
     
  7. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow... Staff Member Moderator Audi S3

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    Sorry dude... my bad... I meant pre cat... brain frazzled after a long day at work...

    Edited for clarity (hopefully lol)

    <tuffty/>
     
  8. mattyboy199

    mattyboy199 Well-Known Member

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    I think you need to change the 1st pre to post unless i'm wong ? and co nfused again
     
  9. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow... Staff Member Moderator Audi S3

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    DOH!!! (edited...again...)

    I'll get my coat....:undwech:

    <tuffty/>
     
  10. mattyboy199

    mattyboy199 Well-Known Member

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    cool all makes sense now thanks !
     
  11. mattyboy199

    mattyboy199 Well-Known Member

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    Yesterday i removed the sensor the head of the sensor was black with soot & it justed wiped off, ive re-installed the sensor & cleared the fault code and it seems to be fine now. Very susprised about this but we will see
     
  12. Vwdan80

    Vwdan80 Member

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    I have just replaced the rear sensor on mine with a genuine part, I have the part number at work and can post it tomorrow if ya want :)
     
  13. BenJee_S3

    BenJee_S3 Active Member

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    Is it easy to do the post cat lambda? Just ordered one from Bosch so intend to do it tomorrow or weds after work.. I'm guessing it's just the heat shield in the way? Haven't had a proper look yet to see if I can get at it!
     
  14. SoljahofSensi

    SoljahofSensi Member

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    I replaced the b1s2 sensor on mine 2-3 months ago with a NGK one off ebay, much cheaper than the bosch ones, it's still early but not had any probs with it touch wood.
     
  15. mattyboy199

    mattyboy199 Well-Known Member

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    Already had mine out, the heat shield isnt in the way, you cant miss it tbh. I would suggest spraying it up 24hrs before with wd40. I just used a spanner & hammer which eventually freed it up. Still yet to replace mine trying to cure a misfiring issue first then gonna clean it up see how that pans out.
     
    BenJee_S3 likes this.
  16. BenJee_S3

    BenJee_S3 Active Member

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    well luckily I work at CAS so I get Bosch and NGK lambdas at cost :)

    ah good, yeah ill soak it before hand then and have a whack tomorrow :) thanks for the speedy replies
     
  17. mattyboy199

    mattyboy199 Well-Known Member

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    Does that mean you could source one for me @ cost for all the friendly advice ;-)
     
  18. BenJee_S3

    BenJee_S3 Active Member

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    Maybe not at cost but definitely cheaper than standard trade!! I'll get a price for you tomorrow ;) post cat lambda same as mine right?
     
  19. mattyboy199

    mattyboy199 Well-Known Member

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    yep post cat with the 4 pin connector
     
  20. BenJee_S3

    BenJee_S3 Active Member

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    No worries I'll get you a price tomorrow :)
     
  21. djarchive

    djarchive Member

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    PRE CAT (Downpipe). 6 pin or 4 pin?

    (2002 BAM S3 8L)


    Can some post a pic... Don't want buy the wrong one.


    Thanks guys.
    Joe
     
  22. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow... Staff Member Moderator Audi S3

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    Pre cat lambda on a BAM is 6 pin (wideband)... Just make sure it's a bosch sensor

    <tuffty/>
     
  23. djarchive

    djarchive Member

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    Hi pal... Got it :) - 6 pin for downpipe near the turbo.

    and the 4 pin? - for the post cat // near the cat underneath the car, itself?

    Any particular brand to go with for that?
     
  24. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow... Staff Member Moderator Audi S3

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    Post cat is 4pin narrow band sensor... Bosch again

    <tuffty/>
     

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