the o2 sensor is usually located on the catyletic converter (the first part of the exaust system leaving the engine looks like a small muffler)usually plugged in with one wire.more often than not they are 13/16.use a box end wrench, 6 point if you have, and maybe a big can of penatrating oil.
It is on the back exhaust manifold.
anywhere from 30 - 75 dollars
There is one on each side of the catalytic converter.
Please answer the question. "How do you change an oxygen sensor in a 2002 Pontiac Bonneville
It is the sensor in the outlet of the catalytic converter.
It is screwed into the exhaust manifold behind the engine.
Its located in the exhaust pipe on rear of engine.
Sensor one is screwed into the exhaust manifold behind the engine.
21 is for the oxygen sensor reading staying at center.
There are two. One before and one after the catalytic converter behind the engine.
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