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Hyundai Equus: Heated Oxygen Sensor (HO2S) Repair procedures - Engine Control System - Engine Control/Fuel System - Hyundai Equus VI 2009-2021 Service ManualHyundai Equus: 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 3 and 4.
4.
Check that the resistance is within the specification.

Specification: Refer to Specification

Removal
[Bank 1/Sensor 1]
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Disconnect the heated oxygen sensor connector.
3.
Lift the vehicle.
4.
Remove the heater protector (B) from the catalytic converter after removing the bolt (A).
5.
Remove the heated oxygen sensor (C) with the spanner after lifting the heater protector (B).

[Bank 1/Sensor 2]
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Disconnect the heated oxygen sensor connector (B).
3.
Lift the vehicle.
4.
Remove the heated oxygen sensor (A).

[Bank 2/Sensor 1, Bank 2/Sensor 2]
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Lift the vehicle.
3.
Disconnect the heated oxygen sensor connector (A).
4.
Remove the heated oxygen sensor (B).
[Bank 2/Sensor 1]

[Bank 2/Sensor 2]

Installation
   
Install the component with the specified torques.
Note that internal damage may occur when the component is dropped. If the component has been dropped, inspect before installing.
   
DONT 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.
Install in the reverse order of removal.

Heated oxygen sensor installation:
39.2 ~ 49.1 N.m (4.0 ~ 5.0 kgf.m, 28.9 ~ 36.2 lb-ft)

    Heated Oxygen Sensor (HO2S) Schematic Diagrams
    Circuit Diagram ...

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