Hyundai Santa Fe: Engine Control System / Heated Oxygen Sensor (HO2S). Repair procedures

Hyundai Santa Fe (TM) 2019-2024 Service Manual / Engine Control/Fuel System / Engine Control System / Heated Oxygen Sensor (HO2S). Repair procedures

Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the HO2S connector.
3.
Measure resistance between the HO2S terminals 4 and 5 [B1/S1] [Euro-V].
4.
Measure resistance between the HO2S terminals 3 and 4 [B1/S1] [Except Euro-V].
5.
Measure resistance between the HO2S terminals 3 and 4 [B1/S2].
6.
Check that the resistance is within the specification.
Specification : Refer to "Specification"
Removal
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Disconnect the connector (A), and then remove the sensor (B).
Tightening Torque :
39.2 - 49.1 N.m (4.0 - 5.0 kgf.m, 28.9 - 36.2 lb-ft)
  
Note that the SST (Part No. : 09392-2H100) is useful when removing the heated oxygen sensor.
[Bank 1 / Sensor 1]

[Bank 1 / Sensor 2]

Installation
  
Install the component with the specified torques.
Note that internal damage may occur when the component is dropped. In this case, use it after inspecting.
  
DON’T use a cleaner, spray, or grease to sensing element and connector of the sensor because oil component in them may malfunction the sensor performance.
Sensor and its wiring may be damaged in case of contacting with the exhaust system (Exhaust Manifold, Catalytic Converter, and so on).
1.
Installation is reverse of removal.

    Heated Oxygen Sensor (HO2S). Schematic diagrams

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