Hyundai Ioniq (AE): Engine Control System / Heated Oxygen Sensor (HO2S). Description and operation

Description
Heated Oxygen Sensor (HO2S) consists of zirconium and alumina and is installed both upstream and downstream of the Manifold Catalytic Converter. The sensor output voltage varies in accordance with the air/fuel ratio.
The sensor must be hot in order to operate normally. To keep it hot, the sensor has a heater which is controlled by the ECM via a duty cycle signal. When the exhaust gas temperature is lower than the specified value, the heater warms the sensor tip.

    Removal 1.Turn the ignition switch OFF and disconnect the battery negative (-) cable.2.Remove the intake manifold. (Refer to Engine Mechanical System - "Intake Manifold")3.

    SpecificationHO2S [Bank 1 / Sensor 1] Item Specification Heater Resistance (Ω)2.4 - 4.0 [20°C (68°F)]HO2S [Bank 1 / Sensor 2] (Binary Type) A/F Ratio (λ) Output Voltage (V) RICH0.

    Other information:

    Hyundai Ioniq (AE) 2017-2022 Service & Repair Manual: Mode Control Actuator. Repair procedures

    Inspection1.Turn the ignition switch OFF.2.Disconnect the mode control actuator connector.3.Verify that the mode control actuator operates to the defrost mode when connecting 12V to terminal 3 and grounding terminal 4.Verify that the mode control actuator operates to the vent mode when connected in reverse.

    Hyundai Ioniq (AE) 2017-2022 Service & Repair Manual: Description and operation

    System OverviewParking Distance Warning (PDW) is an electronic driving aid that warns the driver to be cautious while parking or driving at low speed. The sensor uses ultrasonic waves to detect objects within proximity of the vehicle.PDW consists of four RPS sensors which are detecting the obstacles and transmit the result separated into three war

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