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There are two O2 sensors. One on the exhaust manifold and the other is on the exhaust after the catalytic converter.
The one on the manifold causes the most problems as it immediately affects fuel mixture being delivered to your engine.
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2002 Chevy Trailblazer oxYGen sensor where is it located?
where is the O2 sensor on a 2002 chevy trailblazer
Where is the O2 sensor on Chevy Trailblazer?
Visit trailvoy.com they will help you on any of your questions about your trailblazer. there is one on the exhaust manifold on the passenger side and one below on the exhaust pipe by the side door
Where is the O2 sensor on the 03 Chevy Trailblazer and is there any prep or post work you need to do before changing it?
Ther are two oxygen sensors on the system. One is located at the exhaust manifold and the other just after the Cat. There are several reasons why you may get these codes and at $100 per sensor you do not want to be wrong. If you are destroying a sensor then you should find out why before replacing it.
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You have several O2 sensors on that vehicle and they are all threaded into the exhaust system at various points.
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There are multiple sensors on the vehicle. All are on the exhaust and are accessible from underneath the vehicle. They connect with a snap connector on the electrical wires, and the sensor itself is screwed into a half coupling that is welded onto the exhaust pipe.
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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.
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