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Cleaning an O2 sensor for P0133 850 1995

I got a P0133 code the other day. Second time in about 3 weeks.
Correlated with a 4-4-3 and 4-3-5.
So I'm pretty sure it's a Front O2 Sensor.

What are the odds that this is a false reading? Although the car has 215,000 miles, I'm told the O2 sensor was replaced a few times by the previous owner's mechanic. But I don't know if the mechanic at the time was simply throwing parts at the car.

Any chance an O2 sensor can be cleaned?

Another option would be to move it out of the air flow with an anti-fouler. Seen that work on Mazda vans.

--
"Differences of opinions should be tolerated, but not if they're too different" - Sharon Craig






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