How to deal with oxygen sensor failure
The oxygen sensor just has a fault code, but it is only a surface poisoning, and it is very
slight. If you replace the quality of the gasoline at this time, you can eliminate the toxic
substances on the surface and make o2 sensor return to normal. Therefore, after the fault
code appears, it is not necessary to replace the oxygen sensor. First, the fuel should be
replaced. If the fault persists, replace the oxygen sensor.