Kia Niro: Engine Control System / Heated Oxygen Sensor (HO2S) Repair procedures

Inspection

1.	Switch "OFF" the ignition.

2.	Disconnect the HO2S connector.

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

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

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.

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.

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.

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