Kia Stinger: Engine Control System / Heated Oxygen Sensor (HO2S)

Kia Stinger CK 2018-2020 Service Manual / Engine Control / Fuel System / Engine Control System / Heated Oxygen Sensor (HO2S)

Specifications
Specification

HO2S [Bank 1/Sensor 1]

Item
Specification
Heater Resistance (Ω)
2.5 - 4.0 [20°C(68°F)]

HO2S [Bank 1/Sensor 2]

Item
Specification
Heater Resistance (Ω)
3.3 - 4.1 [20°C(69.8°F)]

Description and operation
Description

Heated Oxygen Sensor (HO2S), consisting of zirconium and alumina, is installed on both upstream and downstream of the Catalytic Converter to detect the air/fuel ratio and send it to the ECM.

The sensor must be heated in order to operate properly. To keep it heated, 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 up the sensor tip.

Schematic diagrams
Circuit Diagram

Harness Connector

[Bank 1 / Sensor 1]

[Bank 1 / Sensor 2]

Repair procedures
Inspection
1.

Switch "OFF" the ignition.

2.

Disconnect the HO2S connector.

3.

Measure resistance between the HO2S terminals 4 and 5 [B1/S1].

Specification: 2.5 - 4.0Ω [20°C(68°F)]

4.

Measure resistance between the HO2S terminals 3 and 4 [B1/S2].

Specification: 3.3 - 4.1Ω [21°C(69.8°F)]

5.

Check that the resistance is within the specification.

Removal
  

Note that the SST (Part No. : 09392-1Y100 or 09392-2H100) is useful when removing the heated oxygen sensor.

[Bank 1 / Sensor 1]

1.

Switch "OFF" the ignition and disconnect the negative (-) battery terminal.

2.

Disconnect the connector (A), and then remove the sensor (B).

[Bank 1 / Sensor 2]

1.

Switch "OFF" the ignition and disconnect the negative (-) battery terminal.

2.

Disconnect the connector (A).

3.

Lift the vehicle.

4.

Remove the catalytic converter bracket (A).

5.

Remove the sensor (B).

Installation
  

Install the component to the specified torques.

Note that internal damage may occur when the component is dropped. If the component has been dropped, inspect before installing.

Keep the sensing element and connector free from cleaner, spray or grease as oil substance may cause the sensor to malfunction.

Sensor and its wiring may get damaged from contact with the exhaust system (e.g. Exhaust Manifold, Catalytic Converter).

1.

Install in the reverse order of removal.

Heated oxygen sensor:

39.2 - 49.1 N·m (4.0 - 5.0 kgf·m, 28.9 - 36.2 lb·ft)

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