Most people don't calculate the fuel consumption of their car, and fill up the gas when they run out. Many people are more concerned about fuel consumption. Generally, the amount of fuel is fixed each time, such as adding 200 yuan each time, and the subtotal mileage is cleared after the fuel is filled. When you need to refuel again, you can know whether your car's fuel consumption has changed by looking at how many kilometers you have run. . It used to be able to run 500 kilometers for 200 yuan, but now it can only run 400 kilometers, which obviously increases fuel consumption. When the same driver drives, the car's fuel consumption increases, and there are often some faults. Therefore, understanding the changes in your car's fuel consumption can eliminate some hidden troubles.

         The main reason for the broken oxygen sensor is poisoning, which is the same as the three-way catalytic damage, and it is also caused by bad gasoline. Excessive lead content in gasoline will cause the oxygen sensor to be damaged over time. Therefore, if the three-way catalyst is generally broken, the life of the oxygen sensor is approaching. According to empirical observations, cars with oxygen sensors often broken are refueled at small private gas stations. It can be driven when the car is broken, but the fuel cannot be corrected. In many cases, the air-fuel ratio cannot reach the best condition, which will cause problems such as increased fuel consumption, incomplete combustion, and substandard emissions. So it must be replaced in time, it cannot be cleaned or repaired.