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If the post cat lambda probe has been turned off in my map...

S3 Paul May 16, 2012

  1. S3 Paul

    S3 Paul Well-Known Member Regional Rep

    My car is using CustomCode phase 3 mapping which has the post cat lambda turned off ( cat bypass fitted ) ive got a AFR gauge fitted and the wideband sensor for that is fitted just before the post cat lambda...
    The question is ... if the sensor is "turned off" in the map does it still need to be plugged in?
  2. <tuffty/>

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

    Normally all thats turned off on post cat lambda is diagnostics... removing it completely is a little more involved mapping wise and isn't something that tends to get done...

    You have to turn off the probe ageing param, heater diagnosis and a few other constants I can't think of off hand...

    Just as easy to leave it plugged in mate tbh...

  3. beachbuggy

    beachbuggy Well-Known Member


    I turned mine off completely, it's not plugged in and no errors come up. Just running the front lambda . If you don't get all the variables and constants then it needs to be plugged in to stop throwing errors. It's easily enough done.

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