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Why your car need oxygen sensor


Automobile oxygen sensor is a key feedback sensor in the control system of electronic injection


engine. It is a key part for controlling automobile exhaust emission, reducing automobile 


environmental pollution and improving the combustion quality of automobile engine fuel. 


The O2 sensor is installed on the exhaust pipe of the engine.


An engine with only one oxygen sensor controls the engine's fuel injection by monitoring the 


oxygen content in the exhaust and passing the signal to the engine control computer to achieve 


feedback control of the air/fuel ratio.


An engine equipped with two oxygen sensors, the former oxygen sensor mainly controls the 


air/fuel ratio, and the latter oxygen sensor monitors the oxygen content in the exhaust gas after 


passing through the three-way catalytic reactor, and transmits the signal to the engine control. 


The computer, so that the engine computer can judge the working condition and working 


efficiency of the three-way catalytic reactor, so as to prompt the driver to promptly replace the 


failed three-way urging device to avoid environmental pollution.




oxygen sensor


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Oxygen SensorCar Spark PlugCar InjectorCar Ignition CoilOil Control Valve