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: Fuel Filler Door
Opening the fuel filler door The fuel filler door must be opened from inside the vehicle by pulling up the fuel filler door release lever. 1. Turn the engine off. Locate the fuel filler door release lever on the floor on the left side of the driver seat. 2. Pull up on the release lever. ...

Hyundai Elantra AD (2016-2020) Service Manual: Schematic Diagrams
Schematic Diagrams Terminal Function Wire No.DesignationCurrentmaxmin13Ground for recirculation pump39 A10 A1Voltage supply for pump motor39 A10 A25Voltage supply for solenoid valves15 A2 A38Ground for solenoid valves andECU15 A2 A22Signal wheel speed sensor (FL)16.8 mA5.9 mA33Voltage supply f ...