Sonata V6-3.0L (1991)
Oxygen Sensor: Description and Operation
Oxygen Sensor Location
An oxygen sensor is used to provide more precise control of air/fuel mixtures. This system operates by measuring oxygen content in exhaust gases, as the
amount of oxygen remaining in the exhaust gases is directly proportional to the air/fuel ratio of mixtures entering the engine.
The oxygen sensor is made of a ceramic material called zirconium dioxide. The inner and outer surfaces of the ceramic material are coated with a very
thin layer of platinum. The outer surface is exposed to the exhaust gasses, while the inner surface is exposed to the outside air.
