Why is the automobile oxygen sensor broken?

If it's a new car, it's mainly the wrong gasoline label. Because the octane number of the fuel used does not meet the requirements of this car, harmful substances in the exhaust gas have corroded, blocked and even polluted the surface of the oxygen sensor, similar to lead poisoning (but most of them are unleaded gasoline at present). If it is an old car, please check the three-way catalyst. It may be because the temperature is too high after plugging, which burns out the oxygen sensor.