TUCSON(LM) >2010 > G 2.4 DOHC > Fuel System > Engine Control System > Heated Oxygen Sensor (HO2S)>Description and Operation | ![]() ![]() |
Heated Oxygen Sensor
(HO2S) consists of zirconium and alumina and is installed both upstream
and downstream of the Manifold Catalytic Converter. It 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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