Montero 4WD V6-2972cc 3.0L SOHC (1991)
Oxygen Sensor: Description and Operation
Oxygen (O2) Sensor Circuit
The oxygen (O2) sensor, located in the exhaust, under the vehicle 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 sensor is also equipped with a heater element. This allows the sensor to reach operating temperature faster than if it had to rely on exhaust gas only.
