The oxygen sensor is a very important component in the automobile emission control system. Its main function is to determine whether there is excess oxygen in the exhaust after engine combustion and to ensure that the three-way catalytic converter has a greater conversion efficiency for pollutants in the exhaust. When the oxygen sensor fails, it will cause incomplete engine combustion and the oxygen content in the exhaust cannot be accurately measured, thus affecting the engine's combustion efficiency and emission quality. So, what is the cause of oxygen sensor failure? There are mainly three aspects: First, the oxygen sensor ceramic is broken, which is caused by long-term use or external impact, etc., which causes the oxygen sensor ceramic part to be damaged; second, the heater resistance wire is burned out, which will cause the oxygen sensor to be unable to heat and affect its normal operation; finally, the internal circuit of the oxygen sensor is disconnected, which will cause the oxygen sensor to be unable to transmit signals normally and affect its working effect. Therefore, when the oxygen sensor is found to be faulty, it needs to be replaced in time to ensure the normal operation and emission quality of the engine. It should be noted that when replacing the oxygen sensor, you should choose a regular auto repair shop to avoid buying counterfeit and shoddy products to avoid affecting the normal use of the vehicle.
The working principle of the oxygen sensor is to use a ceramic sensitive element to measure the oxygen potential in the exhaust pipe of the car, and calculate the corresponding oxygen concentration based on the principle of chemical balance to achieve the purpose of monitoring and controlling the combustion air-fuel ratio, so as to ensure the product quality and the measurement element of exhaust emissions meet the standards. Therefore, the failure of the oxygen sensor will lead to incomplete engine combustion, and the oxygen content in the exhaust cannot be accurately measured, thus affecting the combustion efficiency and emission quality of the engine. In order to avoid oxygen sensor failure, we need to pay attention to maintenance and maintenance, regular inspection, and timely replacement to ensure the normal operation and emission quality of the engine. In addition, Autohome also provides professional car repair services. If you encounter car problems, you can contact our professional technicians at any time to get timely solutions.