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: Cooling Fan Specifications
Specifications ItemSpecificationFan typePullerFan speed controlResistor (HI-LOW-OFF)Air flow rate [m?/h (yd?/h)]1,950 -8% min.Fan speed (rpm)1,650 ± 8%Current (A)11.7 + 10% max. ...

Hyundai Elantra AD (2016-2020) Service Manual: Parking Assist Sensor Repair procedures
Removal 1. Disconnect the negative (-) battery terminal. 2. Remove the front / rear bumper cover. (Refer to Body - "Front Bumper Cover") (Refer to Body - "Rear Bumper Cover") 3. Disconnect the connector (B) from the parking assist sensor (A). 4. Remove the sensor (A) by pulling out ...