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S3 exhaust gas temp sensor problem

Discussion in 'A3/S3 Forum (8L Chassis)' started by marc464, Jul 14, 2013.

  1. marc464

    marc464 New Member

    Oct 22, 2009
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    Hi I have a 2001 audi s3 amk engine and I have had a problem with it feeling sluggish I have sorted some boost leaks and I forgot to plug in the exhaust gas temp sensor went for a drive and it felt great plugged vag com on to the car found egt to bee open circuit so plugged it back in went for a drive and it felt sluggish again any surgestions on what the problem could be
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  3. Chlippo

    Chlippo Member

    Apr 17, 2010
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    Doesn't the egt stores an error when its plugged and you scan the car with vag com
  4. <tuffty/>

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

    Sep 14, 2008
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    With the EGT probe disconnected the ecu runs in protection tables (ecu sees a temp of 1100 degrees) and will over fuel (0.75 lambda) all the time... you will get rubbish MPG and bore wash which promotes engine wear..

    I think the 'sluggishness' could be something else tbh... clear all fault codes and see what comes back... allow the ECU to adapt properly (will take a few miles of driving) and this should bring things back in check...

    Failing that logging will be needed to see if there is any other issues


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