What are the causes of a faulty oxygen sensor?

[SanKhloe]

Oxygen sensor failure causes: 1. Poor fuel quality, resulting in incomplete combustion in the engine cylinders, which produces excessive harmful substances and impurities in the exhaust gases; 2. Spark plug malfunction, preventing normal ignition and effective fuel combustion; 3. Catalytic converter failure. The catalytic converter transforms toxic gases in vehicle exhaust into harmless substances through redox reactions. If the catalytic converter malfunctions and fails to operate properly, the oxygen sensor will also be damaged. The oxygen sensor detects oxygen concentration in the exhaust and sends feedback signals to the ECU, which then adjusts the fuel injector's fuel delivery to maintain the air-fuel ratio near the theoretical value.