Kia Carens: 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. 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.

Removal
1.
Turn the ignition switch OFF and disconnect the battery negative (-)
cable.
2.
Remove the intake manifold. (Refer to En ...
Specification
HO2S [Bank 1/Sensor 1]
Item
Specification
Heater Resistance (Ω)
2.4 ~ 4.0 [20°C(68°F)]
HO2S ...
Other information:
Components
1. Remote control switch (LH)
2. Remote control switch (RH)
3. Bluetooth hands free switch
4. Trip switch
...
Inspection
Antenna Cable
1.
Remove the antenna jack from the audio unit and antenna.
2.
Check for continuity between the center poles of antenna cable.
3.
Check for continuity between the ou ...