Your vehicle's oxygen sensor 1 / 1 is on the exhaust manifold. the oxygen sensor 1 / 2 is in the catalytic converter.
Heres a guide on how to change it, not vehicle specific, but will give you an idea of what to expect
https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor
See the picture attached below
Image (Click to make bigger)
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Saturday, May 8th, 2021 AT 5:32 PM