Carbon monoxide poisoning
Due to the long-term use of automobile parts, more mixed gases will be produced. During combustion, the oxygen content is insufficient and the combustion is not complete. Excessive carbon monoxide will cause carbon monoxide poisoning in the oxygen sensor. Because it not only has an oxidizing effect but also a reducing effect during use, in the state of long-term lack of oxygen, carbon monoxide will be adsorbed on the surface of the parts to form carbon deposits. When the carbon deposits cover more, the activity of carbon will be reduced, resulting in the oxygen sensor being unable to supply oxygen content for combustion, thereby causing the poisoning of automobile oxygen sensors.
Sulfur poisoning
During the operation of the car, sulfur will be burned, and sulfur dioxide will be released after combustion. It will react with certain compounds in the unburned fuel to generate sulfuric acid and other substances, and finally form sulfur compounds adsorbed on the metal surface, which hinders the catalyst from adsorbing oxygen and carbon monoxide, weakens the sensitivity of the oxygen sensor, loses the function of storing and releasing oxygen, and causes the oxygen sensor to fail due to poisoning. The impact of the oxygen sensor is basically similar to that of sulfur.