SSANGYONG Korando 2012 Manual page 331

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d. Oxygen sensor control
The wide band oxygen sensor uses ZnO2. It produces the voltage by movement of oxygen ions
when there is oxygen concentration difference between exhaust gas and atmosphere.
If a certain voltage is applied to the sensor, the movement of oxygen ions occurs regardless of
the oxygen density. The current generated through this flow of ions, is called pumping current
(IP), and the oxygen sensor measures this value.