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). SpecificationsESC Operation Mode
ESC Hydraulic System Diagram
1.
ESC Non-operation : Normal braking.
Solenoid valve
Continuity
Valve
...
Components and Components Location
Components Location
[Vehicle Components]
1. Automatic transaxle
2. Transaxle control module (TCM)
3. Shift lever
4. DLC
[Transaxle Components]
...
Turbo Charger. Components and Components Location
Components
1. Turbine housing
2. Turbine inlet
3. Turbine outlet
4. Compressor housing
5. Compressor inlet
6. Compressor outlet
7. Center housing
8 ...