Hyundai Santa Fe (TM): Engine Control System / Heated Oxygen Sensor (HO2S). Description and operation

Hyundai Santa Fe (TM) 2019-2023 Service and Repair Manual / Engine Control/Fuel System / 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. It 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.

    Specification HO2S [Bank 1 / Sensor 1] [Euro-V] Item Specification Heater Resistance (Ω) 2.

    Other information:

    Hyundai Santa Fe (TM) 2019-2023 Service and Repair Manual: Power Mosfet (DATC). Repair procedures

    Inspection 1. Turn the ignition switch ON. 2. Manually operate the control switch and measure the voltage of the blower motor. 3. Select the control switch to raise the voltage until high speed.

    Hyundai Santa Fe (TM) 2019-2023 Service and Repair Manual: Repair procedures

    Removal 1. Remove the tailgate trim. (Refer to Body - "Tailgate Trim") 2. Remove the tailgate ganish (A). 3. Remove the tailgate switch assembly.

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