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Monthly Archives: May 2012

Oxygen Sensor, How Do They Work!

Oxygen Sensor, How Do They Work!

What is an Oxygen Sensor and how does it work? Every new car, and most cars produced after 1980, have an oxygen sensor. The sensor is part of the emissions control system and feeds data to the­ engine management computer The goal of the sensor is to help the engine run as efficiently as possible and also to produce as few emissions as possible. A gasoline engine uses oxygen to burn gasoline. There is a particular ratio of air and gasoline that is "perfect," and the most common ratio is 14.7:1 (different fuels have different perfect ratios ) If there is less air than this perfect ratio, then there will be fuel left over after combustion. This left over fuel creates pollution. If there is more air than this perfect ratio, then there is excess oxygen. More nitrogen-oxide pollutants are created in this situation and can cause poor performance and even engine damage. Th­e oxygen sensor is positioned in the exhaust pipe and can dete ... read more

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Oxygen Sensor
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