How often does the car oxygen sensor be replaced, and can changing the oxygen sensor save fuel?

The car oxygen sensor is the key feedback sensor in the electronic fuel injection engine control system, which is used to control the emission of car exhaust. But what everyone does not know is that oxygen sensors are actually a kind of vulnerable product, and naturally there is a life span. So, how often does the car oxygen sensor take to be replaced, and can the oxygen sensor save fuel?

Generally speaking, the oxygen sensor needs to be replaced once for a car traveling more than 100,000 kilometers. Of course, we still have to decide according to the actual situation. The fault can be judged by observing the color of the top part of the oxygen sensor (the normal color is light gray). If it is a white top, it means that the oxygen sensor has been contaminated with silicon to a certain degree and needs to be replaced in time. If it is brown, it is caused by lead contamination, and it must be replaced. But if it is a black top, it is mainly caused by carbon deposits, so you only need to clean it.

Can the oxygen sensor save fuel?

It is necessary to know that when the oxygen sensor ages to a certain degree, it will definitely have a great impact on the air-fuel ratio of the car, which will lead to the problem of increased car fuel consumption. So, replacing a new oxygen sensor at this time can naturally save fuel.However, if the rear oxygen sensor is replaced, it must be mentioned separately, because it is originally used to determine the threeYuanThe catalytic working state is nothing, so the replacement will not bring about fuel-saving effect.