| VELOSTER(FS) >2013 > G 1.6 T-GDI > Fuel System > Engine Control System > Heated Oxygen Sensor (HO2S)>Description and Operation |
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Heated Oxygen Sensor
(HO2S) consists of zirconium and alumina and is installed both upstream
and downstream of the Manifold Catalytic Converter. The sensor output
voltage varies in accordance with the air/fuel ratio.
The sensor must be hot
in order to operate normally. To keep it hot, the sensor has a heater
which is controlled by the ECM via a duty cycle signal. When the exhaust
gas temperature is lower than the specified value, the heater warms the
sensor tip.
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