Oxygen Sensor for 5KTQ

Louis-Alain_Richard at computerhorizons.com Louis-Alain_Richard at computerhorizons.com
Mon May 9 12:12:09 EDT 2005

I remember a strange behaviour from a GM pick-up. When we had it
oil-sprayed (for corrosion protection), the Check Engine light would lit
just after, for a couple of days, as if the air surrounding the O2 sensor
was contaminated by the oily fumes. This was an annual ritual, oil and CEL,
for as long as we owned that truck. O2 sensor was of the 1 wire variety.


Solid information on this is hard to find. Air must get in somehow. The
outside shell shows no openings. And if the openings are so small that you
cant see them . . .then they are subject to clogging also.
The only way for air to get in is where the wires come out, or at the
connector end.

I brought up this topic hoping someone else knew more than me.
Then again, maybe this is just an urban myth.


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