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

Hyundai Elantra AD (2016-2020) 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 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.

Knock Sensor (KS) Repair procedures
Removal 1. Turn the ignition switch OFF and disconnect the battery negative (-) cable. 2. Disconnect the knock sensor connector (A). 3. Remove the intake manifold. (Refer to Engine Mech ...

Heated Oxygen Sensor (HO2S) Specifications
Specification HO2S [Bank 1/Sensor 1] (Linear type) ItemSpecificationHeater Resistance (?)2.4 ~ 4.0 [20°C(68°F)] HO2S [Bank 1/Sensor 2] (Binary type) A/F Ratio (?)Output Voltage(V)RICH0.6 ~ 1 ...

Other information:

Hyundai Elantra AD (2016-2020) Owners Manual: Master, Door Ajar, Trunk Open, Hood Open Warning Lights Light
Master Warning Light This indicator light illuminates • When there is a malfunction in operation in any of the following systems: - Exterior lamp malfunction - Blind-Spot Collision Warning (BCW) malfunction (if equipped) - Lane Keeping Assist (LKA) System malfunction (if equipped) - Tire P ...

Hyundai Elantra AD (2016-2020) Owners Manual: Resetting the sunroof
In some circumstances resetting the sunroof operation may need to be performed. Some instances where resetting the sunroof may be required include: - When the 12V battery in the engine room is either disconnected or discharged - When the 12V battery fuse is replaced - If the sunroof one-touch A ...

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