Hyundai Ioniq (AE): Engine Control System / Heated Oxygen Sensor (HO2S). Repair procedures

Hyundai Ioniq (AE) 2017-2022 Service & Repair 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 2 and 5 [B1/S1].

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

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.

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

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

[Bank 1 / Sensor 2]

1.	Turn the ignition switch OFF and disconnect the battery negative (-) cable.

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

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.

•	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)

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

Exhaust Gas Temperature Sensor (EGTS). Description and operation❯

DescriptionInstalled in exhaust manifold, the Exhaust Gas Temperature Sensor (EGTS) #1 for EWGA senses the temperature of exhaust gas flowing into the EWGA.

Other information:

Hyundai Ioniq (AE) 2017-2022 Service & Repair Manual: High voltage shut-off procedures

High Voltage Shut-off Procedures • Be sure to read and follow the "General Safety Information and Caution" before doing any work related with the high voltage system. Failure to follow the safety instructions may result in serious electrical injuries.

Hyundai Ioniq (AE): Engine Control System / Heated Oxygen Sensor (HO2S). Repair procedures

Other information:

Hyundai Ioniq (AE) 2017-2022 Service & Repair Manual: High voltage shut-off procedures

Hyundai Ioniq (AE) 2017-2022 Service & Repair Manual: Components and components location

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