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.

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