Kia Optima: Heated Oxygen Sensor (HO2S). Description and OperationThe 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.

Installation
Heated Oxygen Sensor (HO2S). SpecificationsRear Window Defroster
The defroster heats the window to remove frost, fog and thin ice from the interior
and exterior of the rear window. The ignition switch must be on for the defroster
to operate.
To activate the ...
Fuse Inspection
1.
Be sure there is no play in the
fuse holders, and that the fuses are held securely.
2.
Are the fuse capacities for each
circuit correct?
3.
Are the ...
Inspection
1.
Turn ignition switch OFF.
2.
Disconnect the oil temperature
sensor connector.
3.
Measure resistance between sensor
signal terminal and sensor g ...