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Oxygen Sensor is one of the key parts of your emissions control system. The oxygen sensor is an intricate part of your emissions control system.
In every vehicle, there is a ratio of air and fuel that is perfect for the running of your engine. The oxygen sensor helps your vehicle maintain this balance by sending data to the engine management computer. Oxygen sensors can tell if there is too much oxygen (a lean mixture) or too little oxygen (a rich mixture). Once the information reaches the engine's computer, it can adjust the fuel level so that the ratio has regained its balance