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Hyundai Equus: Heated Oxygen Sensor (HO2S) Description and Operation - Engine Control System - Engine Control/Fuel System - Hyundai Equus VI 2009-2025 Service ManualHyundai Equus: 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.

    Knock Sensor (KS) Repair procedures
    Removal 1. Turn the ignition switch OFF and disconnect the battery negative (-) cable. 2. Remove the intake manifold (Refer to “Intake And Exhaust System” in EM group). 3. Disconnect the ...

    Heated Oxygen Sensor (HO2S) Specifications
    Specification A/F Ratio (x)Output Voltage(V)RICH0.6 ~ 1.0LEAN0 ~ 0.4 ItemSpecificationHeater Resistance (x)Approx. 9.0 [21°C(69.8°F)] ...

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    Front Wiper Motor Repair procedures
    Removal 1. Remove the windshield wiper arm (A) and blade after removing a nut. Tightening torque : 27 ~ 31 N.m (2.8 ~ 3.2 kgf.m, 20 ~ 23 lb-ft) 2. If necessary of removing the wiper blad ...

    Keep your garage dry
    Don't park your car in a damp, poorly ventilated garage. This creates a favorable environment for corrosion. This is particularly true if you wash your car in the garage or drive it into the ...

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