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  1. #1
    Senior Member Three Rings
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    EGt Sensor Code will need to be cleared??

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    quick question

    Expecting my Egt sensor in tomorrow .
    its the passanger side so im expectting an easy install.
    Wondering if i will need to clear the code using a vagcom
    that i dont have. or if it will notice the change and have me
    running correctly again.

  2. #2
    Veteran Member Four Rings highPSI-S4's Avatar
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    Re: EGt Sensor Code will need to be cleared??

    Quote Originally Posted by looseboost View Post
    quick question

    Expecting my Egt sensor in tomorrow .
    its the passanger side so im expectting an easy install.
    Wondering if i will need to clear the code using a vagcom
    that i dont have. or if it will notice the change and have me
    running correctly again.
    Once you install it i believe it will clear the code.
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  3. #3
    Senior Member Three Rings
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    Re: EGt Sensor Code will need to be cleared??

    Thank you i hope so... Im lookin foward hopefully this fixes my problem of the car running alot slower / choppier .. opinions??

  4. #4
    Forum Moderator Four Rings Daft's Avatar
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    Stg 3 '04 A6 2.7T, Stg 2 '14 S4, 2016 SQ5, 2019 RS5 coupe
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    Re: EGt Sensor Code will need to be cleared??

    It will clear the CEL indicator on the gauges but, the error code will still be listed in the short-term memory of the ECU. Not sure if that's an issue for you or not but, I just figured that you might want to know.
    Brett - Moderator
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  5. #5
    Senior Member Three Rings
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    Re: EGt Sensor Code will need to be cleared??

    I am not even recieiving a check engine light on the dash.
    Will this still make the sensor runn ineffectivley if not cleared by vagcom??

  6. #6
    Forum Moderator Four Rings Daft's Avatar
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    Stg 3 '04 A6 2.7T, Stg 2 '14 S4, 2016 SQ5, 2019 RS5 coupe
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    Sterling, VA

    Re: EGt Sensor Code will need to be cleared??

    Quote Originally Posted by looseboost View Post
    I am not even recieiving a check engine light on the dash.
    Will this still make the sensor runn ineffectivley if not cleared by vagcom??
    Oh, the EGT might not leave the CEL light on solid. It probably binked whe nit first failed and then went away.

    Yes, the new sensor will immediately work properly again and doesn't really need to be cleared to have the car run properly.

    I just wasn't sure if you needed it cleared for some kind of inspection or warranty coverage of some type.
    Brett - Moderator
    Issue?: email me.
    _____________________
    Stage 3 2004 A6 2.7T 6M

  7. #7
    Veteran Member Four Rings JackalS4's Avatar
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    Re: EGt Sensor Code will need to be cleared??

    Wow I am in the EXACT same boat lol.

    Just got my passenger EGT in and will be taking it in for this and a few other things Thurs AM. Was going to do it myself but no time and wasn't positive about the code (got no VAG) and there was other work to do on the car anyway.

    Getting out of limp mode for the win!! From what i've read all over this forum, it will fix the slowness/bogging/richness, assuming you don't have any other issues.

    Good luck man!
    Brilliant Black 2001 S4 - 6MT <3

  8. #8
    Senior Member Three Rings
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    Re: EGt Sensor Code will need to be cleared??

    ahaha yeah im plannign on doing it tonight in the dark when i get home very anxious

    Quick question
    Car use to feel like a BEAST in 3rd Right when i hit 3rpm but now 3rd is the Slowest sluggish gear i get to 3rpm and it barelyy pulls and boost gauge is reading 12 Pounds + holding???

  9. #9
    Veteran Member Four Rings mholme's Avatar
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    Re: EGt Sensor Code will need to be cleared??

    Quote Originally Posted by looseboost View Post
    Quick question
    Car use to feel like a BEAST in 3rd Right when i hit 3rpm but now 3rd is the Slowest sluggish gear i get to 3rpm and it barelyy pulls and boost gauge is reading 12 Pounds + holding???
    It's most likely in limp mode because the computer thinks the EGT's are high. I pull my ECU while installing the sensors just in case there may be any stored values. And the passenger side EGT sensor is harder to get at than the driver side in my opinion.

  10. #10
    Senior Member Three Rings
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    Re: EGt Sensor Code will need to be cleared??

    if the car was in limp mode woudlent it only be boosting 5pounds??
    Id pull the Ecu 2 but idk the radio code :|
    I have small hands so im hopeing the pass side is ez

  11. #11
    Veteran Member Four Rings mholme's Avatar
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    08 S4 00 S4
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    Re: EGt Sensor Code will need to be cleared??

    Quote Originally Posted by looseboost View Post
    if the car was in limp mode woudlent it only be boosting 5pounds??
    Id pull the Ecu 2 but idk the radio code :|
    I have small hands so im hopeing the pass side is ez
    Oh, I missed that part where you were hitting 12psi. It's probably still related to the EGT sensor affecting the mixture and such. Unless you have a nother issue(boost leak).

    I have small hands too..

  12. #12
    Veteran Member Three Rings
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    Baytown, TX

    Re: EGt Sensor Code will need to be cleared??

    haha. I have large hands. the passenger side egt is easy. pull your airbox, maf, and accordin hose and you can get it no problem. i think its a 13 or 15mm wrench.

  13. #13
    Veteran Member Four Rings mholme's Avatar
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    Re: EGt Sensor Code will need to be cleared??

    Quote Originally Posted by RedRocketS4 View Post
    haha. I have large hands. the passenger side egt is easy. pull your airbox, maf, and accordin hose and you can get it no problem. i think its a 13 or 15mm wrench.
    It's a 17mm on the EGT. I had to use two different wrenches depending what angle the head of the bolt was facing.

  14. #14
    Veteran Member Four Rings JackalS4's Avatar
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    Re: EGt Sensor Code will need to be cleared??

    I got my EGT done and it's great! Don't think it specifically needs the code cleared, it should clear up on it's own I believe.

    The car always pulls like it should, every single time! Feels great!

    Did you get it in yet?
    Brilliant Black 2001 S4 - 6MT <3

  15. #15
    Veteran Member Three Rings audikidS4's Avatar
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    Re: EGt Sensor Code will need to be cleared??

    I need to do EGT sensors too! No CEL, but codes come up with VAG-COM and car does not seem as strong. No other drivability issues however. Q: Where are y'all getting the sensors? Anyone have a good source for these items?

  16. #16
    Veteran Member Four Rings gointoscott's Avatar
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    Re: EGt Sensor Code will need to be cleared??

    I personally think the passenger side is easy to replace. There are pic's on this link:
    http://www.audizine.com/forum/showth...t=ultimate+diy

    Its for DIY piggies, but the beginning shows how to replace EGT.

    I bought a used EGT from http://www.shokan.com/ Used were $130 I think

    Or new at http://genuineaudiparts.com/ New are a little over $200 I think.

    There are probably other sites that sell them too.
    Original K03's, Ecodes, H&R Coilovers, Inmotion Chip/MBC, Piggies

  17. #17
    Veteran Member Four Rings JackalS4's Avatar
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    Re: EGt Sensor Code will need to be cleared??

    Quote Originally Posted by audikidS4 View Post
    I need to do EGT sensors too! No CEL, but codes come up with VAG-COM and car does not seem as strong. No other drivability issues however. Q: Where are y'all getting the sensors? Anyone have a good source for these items?
    Go to genuineaudiparts.com! Got mine there, nothing but great service!
    Part # 078 919 529 G for passenger side, # 078 919 529 F for drivers. They have weird labels and are working on updating the site. Think it was about $219 or so. You could email them to confirm.

    A bad EGT just makes the car feel slower most of the time, especially at full throttle...and car will randomly feel normal but then sometimes like there's no boost at all. Idles and runs fine otherwise (although apparently rich, putting your other sensors/cats at risk). Basically, what felt to me like a soft limp mode.

    My low 15 sec quarter miles gave it away haha...now she's all fixed up!
    Brilliant Black 2001 S4 - 6MT <3

  18. #18
    Veteran Member Three Rings papuc14369's Avatar
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    Re: EGt Sensor Code will need to be cleared??

    the answer to your question is YES it will need to be cleared. otherwise your car will think its still bad.
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  19. #19
    Active Member One Ring yesgaro's Avatar
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    Re: EGt Sensor Code will need to be cleared??

    Hello, just found this thread... great info, just a couple of extremely noobish questions (new to the forum):

    I have VAG COM errors for both the passenger and driver's side EGT sensors as well as a host of misfire spark plug errors. And a CEL. My mechanic said replacing the EGTs will likely clear up everything as he thought there was a cascade of errors coming from the failure of those units. I do trust him (he was even advising that I do it myself if I wanted), but wanted to get some informed second opinions as well... My questions is: does that sound right, and is it plausible that both EGTs should fail at the same time? Not sure if I should replace them one at a time and if so, in what order...

    Sorry for the general potential ignorance of the question, but any help would be appreciated even if its just a confirmation to replace the EGTs. Let me know if I can provide more info as well to help...

    TIA!

  20. #20
    Veteran Member Four Rings gointoscott's Avatar
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    Re: EGt Sensor Code will need to be cleared??

    You want to replace those egt's. when they are bad it will cause the car to run rich and can foul out 02 sensors, plug your cats - basically ruin other things because the car isnt running right. It also runs in limp mode so basically you have no boost and no power.

    How long have you had the codes? the sooner the better, and replace both right away dont just do one. the passenger side is very easy to replace (at least to me) its easy to get to and just have to remove the accordian hose that goes to intake and its below that.

    The drivers side is harder to reach. its tucked away and the heat shield gets in way. But it can be done.

    If your fouling out spark plugs I recommend just replacing the plugs, they probably are fouled out.

    Happy wrenching
    Original K03's, Ecodes, H&R Coilovers, Inmotion Chip/MBC, Piggies

  21. #21
    Active Member One Ring yesgaro's Avatar
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    Re: EGt Sensor Code will need to be cleared??

    Quote Originally Posted by gointoscott View Post
    Happy wrenching
    Thanks for the input! I saw instructions for the passenger side EGT replacement within a piggie pipe job in the DIYs, but do you know if there is one detailed for the driver side as well somewhere?

    Just about to buy a house tomorrow, so I plan on doing the work shortly after we move in... Although I don't put a lot of miles on the car (work from home) it sounds like its a little more urgent than I realized in terms of the collateral effects of putting it off. Thanks again!

  22. #22
    Veteran Member Four Rings espo4442's Avatar
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    Re: EGt Sensor Code will need to be cleared??

    I wish egt's threw a code everytime when they were going bad or are bad, I'm still trying to figure out if egts are my problem.
    2010 Brilliant Black/Magma Red S4

  23. #23
    Veteran Member Three Rings b5s4tt's Avatar
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    Re: EGt Sensor Code will need to be cleared??

    i throw no cel, but have a code in vag com. you should always check. i could tell immediately as the car smelt more rich out the tailpipe

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