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). SpecificationsDescription
The ECM (Electro Chromatic inside rear view Mirror) is for dimming the reflecting
light from a vehicle behind at night, Preventing glare from the light. The forward
facing sensor detects brightnes ...
Disassembly
Identify MLA(Mechanical Lash Adjuster), valves, valve springs as they are
removed so that each item can be reinstalled in its origina ...
Releasing the parking brake
Foot type
To release the parking brake, depress the parking brake pedal a second time while
applying the foot brake. The pedal will automatically extend to the fully released
position.
Hand ...