Question about 2002 Chevrolet TrailBlazer

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Where is the oxygen sensor located on a 2002 chevy trailblazer

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On the Air tube intake halfway between air filter and intake!

Posted on Oct 21, 2013

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SOURCE: locate camshaft sensor 2002 chevy trailblazer

Assuming you have a 4.2L engine here is the location.
b3031ef.gif

Hope this helps out,
if so please rate my answers.
Brett

Posted on Mar 19, 2009

daves944
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SOURCE: location of oxygen sensors

I think there is more than two. Either way, they are located in the exhaust system. The pre-cat sensors are in the head pipes, just below the exhaust manifold, and then there will be one right behind the catalytic converter. You will need a 7/8 inch wrench or possibly a special O2 socket.

Posted on Apr 05, 2009

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04 chevy trailblazer code po172?


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Hope this helps

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1 Answer

Location of oxygen sensors


I think there is more than two. Either way, they are located in the exhaust system. The pre-cat sensors are in the head pipes, just below the exhaust manifold, and then there will be one right behind the catalytic converter. You will need a 7/8 inch wrench or possibly a special O2 socket.

Apr 05, 2009 | 2002 Chevrolet TrailBlazer

2 Answers

Locate camshaft sensor 2002 chevy trailblazer


Assuming you have a 4.2L engine here is the location.
b3031ef.gif

Hope this helps out,
if so please rate my answers.
Brett

Mar 19, 2009 | 2002 Chevrolet TrailBlazer

1 Answer

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Common issue on teh 03-06 Trailblazer instrument clusters, it's caused by failing stepper motors on the cluster's circuit board. It is fixable, check out this page for more on how to get it fixed - Trailblazer oil gauge broken

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This is actually an easy swap out. Remove the electrical connection, remove the retaining bolt and pull out old one. I believe the sensor is located in the front passenger side of the engine on this particular model.

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