Bank 2 sensor 2

Hello, the code -- and no code -- does not mean that the sensor is faulty. It means -- depending on which code was set - that there's a problem in the circuit perhaps, or that the reading is out of range from what is expected. It's totally possible the sensor is doing its job - and that there's another problem. Also, did you get a genuine GM sensor? Do that first; aftermarket sensors often leave much to be desired. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops