Hyundai Genesis: Engine Control System / Heated Oxygen Sensor (HO2S) Description and Operation

Hyundai Genesis (DH) 2013-2016 Service 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 on upstream and downstream of the Manifold Catalyst Converter (MCC).

After it compares oxygen consistency of the atmosphere with the exhaust gas, it transfers the oxygen consistency of the exhaust gas to the ECM. When the A/F radio is high or low, it generates approximately 1V or 0V respectively. In order that this sensor normally operates, the temperature of the sensor tip is higher than 370°C (698°F). So it has a heater which is controlled by the ECM duty signal.

When the exhaust gas temperature is lower than the specified value, the heater warms the sensor tip.

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Heated Oxygen Sensor (HO2S) Specifications

Specification A/F Ratio (?)Output Voltage(V)RICHMin. 0.8LEANMax. 0.1 ItemSpecificationHeater Resistance (?)3.0 ~ 4.1 [20°C(68°F)] ...

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