To remove the sensor, turn it counter clockwise.
Be sure to coat the threads with anti-seize compound when replacing.
Remove the vacuum hose from the O2 sensor. Remove the wiring harness. Remove the O2 sensor retaining screws. Reverse the process to install the new O2 sensor.
Counterclockwise.
the o2 sensor is located in the exhaust manifold. As you pop the hood and look at the engine, you should see a silver colored heat shield. Unplug the old O2 sensor. Then remove the heat shield. Its easier this way (10 MM bolts). Get a O2 sensor socket and remove the sensor and replace. The rear sensor is located in 1 0f 3 places. Either before in or after the catalytic converter. For this one you just get the O2 sensor socket and remove. (When the engine is cold) Madd Dogg 40/40
If your plan is to install a new O2 sensor, I would unplug the electrical connection to the sensor and then cut the wires off at the sensor. Doing this will allow you to slip a 7/8" box wrench over the sensor and turn it counterclockwise to remove it.
To change an O2 sensor you need to disconnect the wiring harness from the sensor. Use an O2 sensor socket and ratchet set to remove the old sensor and replace with the new one.
Very simply a defective O2 sensor normally. This can be due to many reasons, and in general the only way to rectify it is by replacement. Not entirely true there are many reasons why the O2 sensor will turn the light on, the sensor is the detector for a problem related to combustion. In many instances it will be a defective sensor but don't just assume it is
You can't.
unscrew it
replace the bad sensor and it will turn off.
Remove the vacuum hose from the sensor. Remove the sensor retaining screws. The sensor will come off. Reverse the process to install the new sensor.
It has a conector, just un plug it. Then remove the 02 sensor from the exhaust.
The O2 sensor on a 2000 Hyundai Elantra is removed by disconnecting the wiring harness and unscrewing the sensor from its housing. It can then be removed from the vehicle, inspected, and replaced if needed.