on January 9, 2010, 6:07 pm, in reply to "Re: Audi TT 1.8 2002 - 5 wire Lambda sensor #"
You can monitor the 5 wire sensor on the pink wire.
This is not control but transitional voltage and you should get a reading of 2.5v to 3v for a vehicle that is fueling correctly.
It is opposite as said previously...low volts signal defficiency of oxygen....high volts signal excess oxygen.
You could monitor rear zirconia sensor for reaction times together.
HTH
Simon
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Audi TT 1.8 2002 - 5 wire Lambda sensor - Fixed # - Pete Mutlow December 29, 2009, 11:56 am
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