Some bench test them with an oscilliscope.
No, it will not pass the smog test with a defective or removed O2 sensor.
In rocket test bench, how to measure the temperature. Where is the temperature sensor place in rocket test bench.
See related link which includes instructions for testing any O2 sensor.
It is recommended that you first read about how the O2 sensor works to familiarize yourself with the part. Perform a visual inspection of the sensor, confirm all connections are sound, and there are no cracks or other signs of physical damage to the sensor. Check your fuses to confirm that the O2 sensor is bad. If the fuse is good, you will require a voltmeter and test the sensor.
Depends on what the problem is or what code was set.
The attached to the "Related Question" below has links to Autozone's Chiltons Repair Manual - specifically the O2 sensor sections. Not only covers installation, but there are instructions on testing.
There are many symptoms of a bad O2 sensor. Some are poor fuel efficiency, flashing check engine light, the failure to pass a smog test, and rough idling.
the exhaust, where every o2 sensor is
If the computer diagnostics say it's the O2 sensor, that's what's wrong. If you haven't connected a code scanner try that before you go any further.
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.