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Cylinders 1,3, and 5, the sensor after the catalytic converter. Find the exhaust pipe coming from the front of the vehicle and follow it until you see the O2 sensor after the catalytic converter.
http://www.autoshop101.com/forms/h37.pdf
A/F Sensor for Bank 2 Sensor 1. It is the O2 sensor on the front manifold.
where is the O2 sensor on a 2002 chevy trailblazer
It is a real pain. My suggestion is to take it to a shop.
The 2002 Chevy Cavalier 02 sensor can be found attached to the air cleaner housing. The O2 sensor will be on the back side of the air cleaner housing.
Click 'Install'...
It just cost me $220.00
Mitsubishi Galant, 2002, 4-cyl, O2 sensor, bank 1 sensor 1 (upstream)... PART NUMBER: MR506364
$300 with labor
Stop by your local AutoZone. They will hook it up to a handheld tester and print out which oxygen sensor is failing.
There are 3 Oxygen sensors on Lexus RX300. I have replaced the 2 forwards ones so far. The third one is Post- Catalytic converter and requires drivers seat removal to get at the electrical connector. It is also difficult to remove the O 2 sensor from the exhaust system because it is mounted into an exhaust hanger.