I had gone through diagnosing several systems on the car and believed the o2 sensor was good because I had continuity on the heater circuit and was getting voltage from the signal circuit. the voltage was too high though so it was affecting the car worse than not having a sensor at all. I am not promising this test means that the O2 sensor is the one and only problem you have. youay have a leaky or plugged injector among other problems but this may get your car to run well enough until you get it sorted or until you are able to repair it. please like and subscribe if this is helpful to you and feel free to ask questions or let me know your results in the comments