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egt sensor location on '03 S3

Discussion in 'A3/S3 Forum (8L Chassis)' started by smest, Dec 21, 2010.

  1. S3 Nattie
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    S3 Nattie Quattro ist für sissies

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    Ye I could feel the bolt by putting my arm under the TIP. I cant find it anywhere new except for at TPS or Audi.

    What part number you got. If you get a new one before me post up your results.
    #41
  2. karls s3
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    karls s3 Member

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    06a 919 259 b part number ..
    #42
  3. LD3
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    LD3 Member

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    I had mine done last month and looking thorugh the file on my car it was replaced by the previous owner in August 2010. This sensor shouldn't go so quickly should it?

    Mine still heistates and doesn't feel 100% at times.
    #43
  4. S3 Nattie
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    S3 Nattie Quattro ist für sissies

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    Thats interesting. How much did you pay for your sensor.

    Was you getting the code that I listed above.
    #44
  5. LD3
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    LD3 Member

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    I don't have Vagcom yet-APS advised me that an EGT fault was coming up. They deleted it and said when I come back the following week and it's still there then its best to replace it. It was £182. I think mine might be spark plugs or something though as I'm not getting heavy fuel consumption.
    #45
  6. S3 Nattie
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    S3 Nattie Quattro ist für sissies

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    You would have a misfire if your spark plugs were faulty. You may have a vacuum or boost leak somewhere if you think its still not 100%.

    Have you checked the wire which connects to the EGT sensor under the inlet manifold. Would be worth getting your car put on the computer again to see if you have any other fault codes now.
    #46
  7. LD3
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    LD3 Member

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    I haven't no-is this possible without takingthe manifold off?

    I had all the pipes under the manifold done at the same time and I've got all the Forge silicone hoses and replaced all other pipes as I've had leaks since I bought it. Also done the plugs recently too. Will get it on a computer and rolling roaded next month as it's annoying it's not running bow it was and should given the amount of things I've replaced.
    #47
  8. karls s3
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    karls s3 Member

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    any one got a egt sensor for sale as its very had to find one second hand tryed loads of places
    #48
  9. quinnj2
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    quinnj2 Member

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    Hi Guys

    I 've been suffering with EGT problems these past few days.

    Given the original poster's error I would first check wiring to the G235 and check/clean the earth points under the battery and make sure the pins in the connector are tight and make a good contact. Try and trace the braided cable all the way to the turbo to ensure it's not damaged or restricted.

    My current problem is I was hitting the EGT limit (Exhaust gas temperature control bank 1 limit attained) way too often so myself and JBS decided the EGT sensor (G235) could be to blame, I had changed it only about 2 years ago and it cost £170, it fixed my problem at that time (17863 - Exhaust Gas Temp Sensor 1 (G235): Implausible Signal) but I was pee'd off that it could be causing my current problems, so I had to eliminate it and as you say there are hard to find secondhand so I went to TPS and brought one.

    Current price is £171 inc VAT, despite having contacts in the trade I could get nothing off it, they really don't make a lot on these.

    So I replaced it and it made no difference, temps were still as before, not happy. Started to think the k04 hybrid I have was the problem but then looked at blocked or collapsed cat/backbox and found a small leak on the downpipe to cat flange, so I'm pretty sure my problem with high temps was due to a leak in the exhaust, as when fixed temps are lower, I'm keeping an very close eye on things at the mo.

    I will be putting my old one on ebay soonish, not sure of what price I should be asking, but will let you know if you're interested.

    This is my old one, brought in 2009, manufactured in 2007. Part number ends with B.
    [​IMG]
    [​IMG]


    This is the new one, note the D on the part number.
    [​IMG]
    [​IMG]

    Regards
    Jimbo
    #49
  10. karls s3
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    karls s3 Member

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    so your saying its not the sensor at fault on yours it could be a exhaust leak..
    #50
  11. quinnj2
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    quinnj2 Member

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    In my case it appears that way, but as said keeping a close eye on it, gonna stick it on my mates ramp today and check it out again.

    With mine on idle from starting up cold the egt's were reaching 600 C, when I found the small leak (could see smoke coming out at the top of the flange on my blueflame downpipe to my blueflame cat, very hard to see) I fixed it by cleaning the flanges and exhaust paste and tested from cold again and the temps went up to a more happier 350 C. Did some research and from what I can find it does look like exhaust leaks can cause high egt's, maybe someone on here with more experience can confirm or not.

    You must defo check out the basics first to eliminate them.

    Regards
    Jimbo
    #51
  12. karls s3
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    karls s3 Member

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    ok mate cheers will do not done any logs on the egt temps i just get a error code on vag com

    17863 - Exhaust Gas Temp Sensor 1 (G235): Implausible Signal
    P1455 - 35-10 - - - Intermittent
    #52
  13. quinnj2
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    quinnj2 Member

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    No Prob dude, do a clean and check on the earth points under the battery and check the pins are tight on the connector to the G235. Log Block 112, 031 and 001, 112 shows EGT, do a run in 4th WOT and stick the logs on here for people to have a look at.
    #53
  14. S3 Nattie
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    S3 Nattie Quattro ist für sissies

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    thanks for your info quinnj2. My exhaust is actually leaking very slightly from the downpipe to de cat. Im going to sort that out first now and then check the connector/wiring and earth when I get my ass into gear.
    #54
  15. karls s3
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    karls s3 Member

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    Seems a common problem with exhaust leaking from down pipe
    #55
  16. karls s3
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    karls s3 Member

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    i found my car idles better with this sensor un pluged so it must be sensor faulty so if any one has one thats working for sale pm me please ..
    #56
  17. S3 Nattie
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    S3 Nattie Quattro ist für sissies

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    Does anyone know how to remove the sensor from the car. Its all unplugged but something is stopping it on the side of the engine.

    Anyone know what else must be removed.
    #57
  18. superkarl
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    superkarl MAN OF STEEL

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    stupid gay plastic clips that attatch it to something you cant even see. i cut mine in half i got that frustrated haha.
    #58
  19. S3 Nattie
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    S3 Nattie Quattro ist für sissies

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    I got it out now.

    Ye I know what you mean with them clips lol.... annoying.
    #59
  20. S3 Nattie
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    I got another sensor and just installed it. Just went and done some logging and my EGT's and lambda values are more realistic. Hopefully the code doesnt come back.
    #60
  21. karls s3
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    karls s3 Member

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    i just recived my sensor today just about to go and fit it in a min and clear code and hope for the best.. s3 nattie how much you pay for your sensor mate
    #61
  22. S3 Nattie
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    S3 Nattie Quattro ist für sissies

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    I got mine from a forum member buddy. Let us know how you get on.
    #62
  23. karls s3
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    karls s3 Member

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    all fitted now have to wait and see if i get error code back.. what a pain in the ars to remove the old one along the side of engine ended up cutting the cable and pull it out..
    #63
  24. S3 Nattie
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    S3 Nattie Quattro ist für sissies

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    LOL It is annoying getting the wire out ini. I was just about to cut it but I thought il bare with it for bit longer and managed to get it out in one piece lol.

    Let me know what your max EGT is next time you log.
    #64
  25. Alex C
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    Alex C Well-Known Member

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    How is your car now that you've replaced the EGT sensor? any better?
    #65
  26. karls s3
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    karls s3 Member

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    fault code has gone mate but car still not idleing properly it gets worse after i been on motorway think i got a blow in exhaust some where but wont find out till i get it on ramp saturday.. but not had code since fitted the new sensor
    #66
  27. Alex C
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    Alex C Well-Known Member

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    mmmm, have you noticed any improvement on fuel consumption?
    #67
  28. karls s3
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    karls s3 Member

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    no mate not really getting about 20mpg round town i think i need to get the exhaust checked as its no right
    #68
  29. nac5000
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    nac5000 New Member

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    this may help

    [​IMG]
    #69
  30. Sam_
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    Sam_ Down under

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    Just had this fault appear on mine, 17863. Cars been knocking/pinking on boost now and then. Would this cause it? I did notice I have an exhaust leak after the cat where the Milltek joins. Going to sort it at the weekend.
    #70
  31. s3dave
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    s3dave TFSI Hybrid

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    Just check your EGT sensor has not wound itself out ..as it did on westys..
    #71
  32. Sam_
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    Sam_ Down under

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    I do have a rattling back there sometimes. I just put it down to the harder mounts. I'll check it out cheers. This damn car...
    #72

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