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os2 sensor PLEASE HELP~~~

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Old Nov 19, 2002 | 06:06 PM
  #1  
powerbook76's Avatar
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Default os2 sensor PLEASE HELP~~~

just found out today that my car's check engine light keeps coming up (even after removing my GIAC X-Chip and BOV and replacing BOV with Bailey BPV)
folks at AWE told me the fault was due to Oxygen Sensor...
can anyone tell me what that means? and what i can do? the last time i brought the car to the dealer, they told me it was due to chip and charged me $75 just inspecting it..
could that have been due to my GFB BOV?
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Old Nov 19, 2002 | 07:20 PM
  #2  
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Default Re: Sensors can go bad...

Its a probe kind of sensor with some holes...it reads a voltage...pretty percise kind of deal. They can go bad.
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Old Nov 19, 2002 | 07:28 PM
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Default so what is it related?.

is it or was it related to BOV that was installed before i replaced it with BPV?
is it fixable? then how? please help me... thank you
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Old Nov 19, 2002 | 07:35 PM
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Default Re: Running rich can foul up the 02 sensor which you were doing...

been there done that tried it on the dyno...pretty much a no-no.

Running rich can send both unburnt and a whole lot of carbon hitting the 02 sensor. I've heard of many people ruining them.

Even though I have ran rich, my sensor even got dipped in CV boot grease and still has been bulletproof. Looks like yours wasn't:-(.
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Old Nov 19, 2002 | 07:47 PM
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Default so what do i do? go kill audi dealer people? j/k

so basically my car ran so rich for awhile that it messed up the sensor? has to be replaced?
****.. i bet you the dealer won't even replay it without yelling at me first then charging me thousands!!!
so getting a new air sensor would fix the problem?
thank you
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Old Nov 19, 2002 | 09:10 PM
  #6  
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Default you can buy the sensor @ the parts counter for 120-180$.. an easy swap& you can do it yourself

just dont put that BOV back on & you shouldnt have any more problems
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Old Nov 20, 2002 | 12:10 PM
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Default You can also buy it at

<ul><li><a href="http://www.vwparts.com">http://www.vwparts.com</a</li></ul>
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Old Nov 23, 2002 | 01:09 PM
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Default A4 or S4? Downpipes?

Did they say with O2 sensor is bad? An s4 has 4.
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