I had a check engine light. Got the OBD tool and discovered P0134 code. I'm not sure if it is )O2 snsor issue, but I'm thinking it doesn't hurt to replace and hopefully solves the problem as well. I saw only one post related to this. I can be hands-on with simple-medium complexity jobs with appropriate instructions and I found the below video on how to change O2 sensors.
Now, is it as simple as it looks? Any other advice is appreciated.