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Originally Posted by bigrod118
well checking the ohms and resistance will only check to see if the sensor itself works, but if its old and dirty and just worn, but still works, it stil may need to be replaced. I believe o2 sensors replacement intervals are 100k maybe even 80k. I had to repalce mine at 140k, but it was really really bad.
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well, i borrowed the sensor removal tool from a local autozone. it came out extremely easily for me, thank goodness. in fact, easier than any other single fastener in my entire rusty car. maybe this means it was replaced recently..
anyways, it had a white crust on it. very thin. doesnt look like it would impair air flow through the sensor. my manual suggests this would indicate an internal coolant leak. is that necessarily so? if so, i assume fixing the coolant leak would be a big pain in the butt, and that replacing the o2 sensor would be a waste of time (just be mucked up again).
my coolant level has not perceptibly changed in the last few months, so its obviously not much.
ideas?
anthony