So as the title says, I'm having an issue with my passenger side upstream o2 sensor. I swapped it out with a new one but that didn't solve the problem. The car sounds like it's misfiring but after talking to a friend he said it might just be running lean. It idles at about 750 rpm after it's warm. It's giving me codes P1148 and P0031. It was also giving me code P0130 but after i changed the o2 sensor, that code seems to have gone away. I appreciate any help/advice you guys have to give. If I didn't give enough information to make sense lmk what other info would be helpful. I have a mechanic scan tool so I can get basically any info about the car that's needed. Thanks in advance 🙏🏻