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Hyundai Equus: Heated Oxygen Sensor (HO2S) Description and Operation - Engine Control System - Engine Control/Fuel System - Hyundai Equus VI 2009-2023 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 [21C(69.8F)] ...

    See also:

    This device complies with Part 15 of the FCC rules.
    Operation is subject to the following two conditions: 1. This device may not cause harmful interference, and 2. This device must accept any interference received, including interference that may c ...

    LCD Display Control
    The LCD display modes can be changed by using the control buttons on the steering wheel. 1)  button : Changing LCD modes (right to left), or returning to previous position (2)   but ...

    Repair procedures
    Compression Pressure Inspection     If the there is lack of power, excessive oil consumption or poor fuel economy, measure the compression pressure. 1. Warm up engine to norma ...

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