600SEL (140.057) V12-6.0L (120.980) (1993)
Oxygen Sensor: Description and Operation
Oxygen Sensor
Oxygen Sensor (Three-Wire Type)
Oxygen Sensor With Internal Heater
PURPOSE AND LOCATION
Two oxygen sensors (G3/3 and G3/4), located in the exhaust system upstream of the catalytic converter, are used to provide more precise control
of air/fuel mixtures.
OPERATION
This system operates by measuring oxygen content in exhaust gases, as the amount of oxygen remaining in the exhaust gas is directly proportional
to the air/fuel ratio of mixtures entering the engine. The sensor, mounted in the exhaust stream, reacts to the oxygen remaining in the exhaust gases
and produces a variable voltage signal (0.4 - 1.0 VDC) depending upon the oxygen content.