Every new car, and most of the cars that were produced after 1980, have oxygen sensors. These sensors are part of the emission control system. In addition, they feed data to the engine management computer. But what is their goal?
An oxygen sensor helps the engine run as efficiently as possible and makes sure it produced less emission. it is positioned in the exhaust pipe and it is capable of detecting lean and rich mixtures. In most of these sensors, the mechanism involves chemical reaction that generates a voltage.
Check out how it works!