What Causes an Oxygen Sensor to Fail?

[LeElle]

Here is a detailed introduction to the reasons for oxygen sensor failure: Poor fuel quality: If the fuel added to the car is of excessively low quality, it will not burn effectively in the engine cylinders, resulting in a significant amount of harmful substances and impurities in the exhaust gases, which can naturally damage the car's oxygen sensor. In this case, higher-quality fuel should be used, and a bottle of fuel additive should be added to clean the fuel tank every 3,000 to 5,000 kilometers of driving. Spark plug failure: When there is a problem with the spark plugs, they cannot ignite normally, so the fuel and air mixture in the engine cylinders cannot burn effectively, producing more harmful substances and impurities that damage the oxygen sensor. In this situation, the wear level of the spark plugs should be checked, and the working voltage of the ignition coil should be verified. If necessary, new spark plugs should be replaced. Three-way catalytic converter failure: The three-way catalytic converter converts toxic gases in the car's exhaust into harmless substances through its oxidation-reduction function. If the three-way catalytic converter fails and cannot work properly, the oxygen sensor will also be damaged accordingly. In this case, it should be repaired at a repair shop.