E 320 Coupe (124.052) L6-3.2L (104.992) (1994)
Oxygen Sensor: Description and Operation
Oxygen Sensor
Oxygen Sensor (Three-Wire Type)
Oxygen Sensor With Internal Heater
PURPOSE AND LOCATION
The oxygen sensor (G3/2), located in the exhaust system upstream of the catalytic converter, is 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.