It looks to me that bank 2 is running lean and the o2 sensor is probably fine. Look for vacuum leaks. Spraying throttle body cleaner around the engine is an effective way to locate leaks. Check intake, plenum and throttle body bolts to make sure none are loose. Don't over tighten. You could have dirt in your injectors. Change the fuel filter. Add 2 bottles of fuel additive. Buy some from the dealer, they generally work well. Good luck!