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

Hyundai Sonata LF 2014-2019 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 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 ...

Heated Oxygen Sensor (HO2S) Specifications

Specification HO2S [Bank 1/Sensor 1] (Linear type) ItemSpecificationHeater Resistance (?)2.4 ~ 4.0 [20°C(68°F)] ItemSpecificationHeater Resistance (?)Approx. 9.0 [20°C(68°F)] HO2S [Ba ...

Other information:

Hyundai Sonata LF 2014-2019 Owners Manual: Anti-lock Brake System (ABS)
WARNING An Anti-Lock Braking System (ABS) or an Electronic Stability Control (ESC) system will not prevent accidents due to improper or dangerous driving maneuvers. Even though vehicle control is improved during emergency braking, always maintain a safe distance between you and objects ahead of y ...

Hyundai Sonata LF 2014-2019 Owners Manual: Before Starting
Make sure the hood, the trunk, and the doors are securely closed and locked. Adjust the position of the seat and steering wheel. Adjust the inside and outside rearview mirrors. Verify all the lights work. Fasten your seatbelt. Check that all passengers have fastened their seatbelts. Check the ...