C 240 4MATIC Sedan (203.081) V6-2.6L (112.916) (2005)
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
- Function chain tests.
O2-sensors downstream of the catalytic converter: The O2-sensor signal is needed for
- Two-sensor control (USA) and EURO3/4
- Monitoring catalytic converter efficiency
Finger Sensor
O2 Sensors, Design
Finger Sensor
1
Electrical connection
2
Sensor housing
3
Active ceramic probe body