Final generation of the Pontiac Grand Am.

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Where is the Oxygen Sensor?

Hello, i was trying to fine where to place my oxygen sensory in my 2000 Grand am can you help me thanks.

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All 99+ models are equipped with two oxygen sensors. One upstream Oxygen sensor, and one downstream Oxygen sensor. The upstream oxygen sensor is mounted in the exhaust before the catalytic converter, and the downstream one is mounted in the exhaust after the catalytic converter. There is some great info on how to check and replace the Oxygen Sensor right here. Hope this helps, good luck.

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It is threaded into the exhaust manifold on the rear side of the engine. You will need a special socket that fits over the sensor and the wire lead.

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A link to that special socket would really improve this answer.


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You could get two O2 sensor socket at any automotive parts place

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