SL 65 AMG (230.479) V12-6.0L Turbo (275.981) (2005)
Oxygen Sensor: Description and Operation
GF07.04-P-4103-01M O2 Sensors Function
GF07.04-P-4103-01M O2 Sensors Function
- up to model year 08
Component Identification
The sensor ceramic is conductive for oxygen ions from approx. 300 °C. If the oxygen share varies greatly on both sides of the ceramic probe body, a
voltage (Nernst concentration cell) is generated on the friction planes by means of the particular properties of the ceramic probe body on the friction
plane. This is a measure for the residual oxygen content in the exhaust.
Component Identification
Faults at the O2 sensor can be detected by means of the O2 sensor signal.
Defined limit values must be maintained for the O2 sensor voltage, the duration of the period and for the sensor status change.
The O2 sensor signal has a steep voltage jump (lambda=1) at the transition from a rich to alean mixture. This property is utilized for the lambda
closed-loop control.