2000 Chevy Cavalier How can I tell which oxygen sensor is d

Hello,

Here is the exact code def.

P0133 Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 1)

Which since your vehicle is a 4 cylinder you only have 1 bank. Sensor 1 would indicate the sensor located in the Exhaust Manifold. Sensor 2 would be the next one back.

So you would replace the sensor in the exhaust manifold.

Hope this helped.

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