22690-AQ800 22690-2A000 OXGEN SENSOR FOR NISSAN

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An auto oxygen sensor, also known as an oxygen (O2) sensor or lambda sensor, is a crucial component of a vehicle’s emission control system. It measures the amount of oxygen in the exhaust gases and provides feedback to the engine control unit (ECU) for proper fuel-air mixture adjustment.

The primary function of an auto oxygen sensor is to monitor the level of oxygen in the exhaust gases. It determines whether the air-fuel mixture being burned by the engine is too rich (excess fuel) or too lean (excess oxygen).

Location: The oxygen sensor is typically located in the exhaust system, either in the exhaust manifold or in the exhaust pipe downstream of the engine. Some vehicles may have multiple oxygen sensors to monitor different areas of the exhaust system.

Construction: The sensor consists of a ceramic body coated with a special material like zirconium dioxide or titanium dioxide. It has a reference chamber that measures the oxygen content in the exhaust gas and sends an electrical signal to the ECU.

Role in Emission Control: The information from the oxygen sensor is used by the ECU to adjust the fuel injection and ignition timing, ensuring optimal combustion efficiency and reducing harmful emissions. This helps the vehicle meet emission regulations and maintain fuel economy.

In summary, the auto oxygen sensor plays a vital role in monitoring and adjusting the air-fuel mixture for optimal engine performance and emission control. Its feedback helps maintain efficient combustion, reduce pollution, and ensure compliance with emission standards.



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