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) Service Manual: Starter Repair procedures
Removal 1. Disconnect the battery negative terminal. 2. Remove the battery tray. (Refer to Engine Electrical System - "Battery") 3. Remove the air duct and air cleaner assembly. (Refer to Engine Mechanical System - "Air Cleaner") 4. Disconnect the starter cable (A) from the B te ...

Hyundai Elantra AD (2016-2020) Service Manual: Air Ventilation Seat Repair procedures
Removal [Ventilation Blower] 1. Disconnect the negative (-) battery terminal. 2. Remove the front seat. (Refer to Body - "Front Seat Assembly") 3. Remove the blower duct. 4. Remove the blower FAN (A) after removing the screws. [Ventilation Seat Unit] 1. Disconnect the negativ ...