Kia Niro: Engine Control System / Heated Oxygen Sensor (HO2S) 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: Approx. 9.0 Ω [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) can be used for 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).

Heated oxygen sensor :

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

[Bank 1 / Sensor 2]
1.

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

2.

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

Heated oxygen sensor :

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

Installation
  

Install the component to the specified torque.

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 (HO2S) Schematic diagrams
Circuit Diagram Harness Connector [Bank 1 / Sensor 1] [Bank 1 / Sensor 2] ...

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