Common results point to "You can not clean an O2 sensor, it must be replaced"
No, replace if malfunctioning.
No, once it's gone, it's gone.
Depends on what the problem is or what code was set.
You can use electric contact cleaner for that. You can get at any auto parts store.
Say: "It makes sure the air in a car is clean enough to breath."
Any outside contaminant can damge the O2 sensor and render it useless. I have tried to clean O2 sensors, but it doesn't seem to work very well. What you can do is spray it with a carb cleaner and re-install to see if it helped any.
the exhaust, where every o2 sensor is
Replace it.
The upstream O2 sensor is mounted in the ehxaust manifold The downstream O2 sensor is mounted in the exhaust pipe after the catalytic converter
The O2 sensor can be found on the outside of the air cleaner housing. The O2 sensor will be attached to the back of the air cleaner housing.
The upstream O2 sensor is mounted in the ehxaust manifold The downstream O2 sensor is mounted in the exhaust pipe after the catalytic converter