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Is it possible to "clean off" o2 sensors?

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Old 11-26-2008, 09:40 AM
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Once the beast is wretched from it's lair, best to deal with it harshly and finally.
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Old 11-26-2008, 09:45 AM
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the beast is collecting dust... this is for the DD
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Old 11-26-2008, 10:00 AM
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Default I mean the sensor itself. I supose cleaning it would be a "known" thing. Probally it gets poisoned.
By trans-metallics in the afterburn, like manganese, phosphorous and whatever. Throttle body cleaning does not seem to do them much good either.
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Old 11-26-2008, 10:03 AM
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gotcha, looks like replacing the fronts are the way to go.
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Old 11-26-2008, 10:12 AM
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Default ah, yeah just do the pre-cat O2 sensors unless the rears are throwing codes
the rear o2 sensors have no effect on the fuel mixture, they just make sure the cat is working efficiently.
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Old 11-26-2008, 10:13 AM
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nope, no codes, but I did run the readiness checks and it said something about o2 emissions not pass
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Old 11-26-2008, 10:22 AM
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Default infinite n00bness asking question please proceed with caution or skip this post.
what actually physically and chemically happens to them over time?
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Old 11-26-2008, 10:31 AM
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Default I wouls guess that they just get plugged with crap or contaminiated...
...or the heaters burn out. If you google up some O2 theory, it's interesting reading.
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Old 11-26-2008, 10:36 AM
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I've got 144k on mine. Guess it's time to change 'em.
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Old 11-26-2008, 10:56 AM
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Default Meh. No code, no change is my mantra. All originals in my car at 165k, on the A6....
...3 out of 4 are original at 247k.
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