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2021 - Throwing a P0420 code. Not sure if it’s entirely bad but if it’s an easy swap I wanted to start there to see if it fixes the check engine light and code. No warranty left for the O2 sensor but catalytic converter is still covered by the 8/80k.

I have a bad O2 sensor (Bank 1) and cannot find any videos or pictures on if it’s difficult to access. I have found the diagrams for the exhaust system but it doesn’t provide me much reference to see if anything is in the way for a repair. Wanting to see if it’s something I can do or if I...