O2 sensor question

[Louis-Alain Richard]

There is an easy way to test an O2 sensor. It only takes a propane handheld
torch. You should heat the tip to red, then you pass the torch over the tip
quickly and voltage will fluctuate if the sensor is good. There is numerous
web page on this procedure you can read.

However, the sensor is so inexpensive on a 4k that just the task of removing
it justify its replacement. And if you do it regularly, it won't be welded
to the exhaust pipe by rust. I've broken a few sockets in the past while
trying to remove O2 sensor that were on cars for too many years.

Louis-Alain

> -----Message d'origine-----
> De : quattro-bounces at audifans.com [mailto:quattro-bounces at audifans.com] De
> la part de Bill Green
> Envoyé : 17 juin 2010 20:59
> À : quattro at audifans.com
> Objet : O2 sensor question
> 
> What should the correct voltage readings be for the O2 sensor on my 2.2L
> 4K
> Quattro? At the moment it stays at .35 volts when cold and after warming
> up
> fluctuating less than .01 volts. With the ignition on but not running the
> I
> get .5 volts coming from the ECU.  TIA!
> 
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