S 500 Coupe (140.070) V8-5.0L (119.980) (1997)
Oxygen Sensor: Description and Operation
O2 Sensors, Location/Task/Design/Function
O2 Sensors, Task
O2 Sensors, Task
1
Electrical connection
2
Sensor housing
3
Active ceramic probe body
4
Electrode (inner)
5
Electrode (outer)
6
Heating element
7
Inner, open combustion chamber
8
Protective tube
9
View of electrical connection for O2sensor
1 Sensor heater
2 Sensor heater ground
3 O2 sensor signal ground
4 O2 sensor signal
G3/1
O2 sensor downstream of TWC
G3/2
O2 sensor upstream of TWC
G3/3
Left O2 sensor upstream of TWC
G3/4
Right O2 sensor upstream of TWC
G3/5
Left O2 sensor downstream of TWC
G3/6
Right O2sensor downstream of TWC
Records the residual oxygen in the exhaust gas and sends a signal to the engine control unit.
O2-sensors upstream of the catalytic converter: The O2-sensor signal is needed for
- Lambda control
- Self adaptation of the mixture formation