0258006569 Auto rear oxygen sensor

Introduction to oxygen sensors: Automotive oxygen sensors are one of the most common sensors in traditional internal combustion engines, which can be subdivided into front oxygen sensors (also known as upstream oxygen sensors) and rear oxygen sensors (also known as downstream oxygen sensors). Among them, the front Oxygen Sensor is installed behind the exhaust manifold and in front of the three-way catalytic converter, which is mainly used to detect the oxygen content in the exhaust gas after the combustion of the engine mixture, and feedback the data to the ECU (engine control computer) to correct the air-fuel ratio; The post-oxygen sensor is installed behind the three-way catalytic converter and is mainly used to monitor the oxygen concentration of organic waste gas after three-way catalytic purification. In general, the oxygen concentration data of the front oxygen sensor is more informative than that of the rear oxygen sensor. If the data obtained by the pre-oxygen and post-oxygen are the same, the three-way catalysis has been damaged.

The damage of the oxygen sensor is mainly caused by the filling of leaded gasoline, ceramic cracking, heating resistance wire blowing, etc. After the oxygen sensor is damaged, it will cause the vehicle running instrument to light the engine fault light for early warning, accompanied by increased fuel consumption, weak acceleration, unstable idle, exhaust emissions and other fault phenomena, and the corresponding fault code will be stored in the ECU.