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Cavalier Starting in the 1980s. the Cavalier made a name for itself by offering an affordable 2 and 4 door compact.
Platform: J-body

Upstream O2 Sensor

   
Old January 25th, 2018, 12:23 PM
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Default Upstream O2 Sensor
Can some tell me where the Upstream O2 Sensor is on my 2000 Z24 2.4 Lt is please.
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Old January 26th, 2018, 7:08 AM
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There are 2 02 sensors for each pipe. The first one in line is the upstream.
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Old January 26th, 2018, 8:58 AM
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Originally Posted by oldchevy
There are 2 02 sensors for each pipe. The first one in line is the upstream.
Thanks for that but my question is where is the upstream sensor located? Do I have to go under the car? Is it on the driver's side etc.
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Old January 26th, 2018, 9:26 AM
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It's on the exhaust pipe before the cat under the car.
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Old January 26th, 2018, 10:31 AM
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Originally Posted by oldchevy
It's on the exhaust pipe before the cat under the car.
O.K. got it, thank you very much.
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