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: Limitations of the System
The Smart Cruise Control system may have limits to its ability to detect distance to the vehicle ahead due to road and traffic conditions. On curves The Smart Cruise Control system may not detect a moving vehicle in your lane, and then your vehicle could accelerate to the set speed. Also ...

Hyundai Elantra AD (2016-2020) Service Manual: Evaporator Temperature Sensor Repair procedures
Inspection 1. Turn the ignition switch OFF. 2. Disconnect the evaporator temperature sensor connector. 3. Measure the resistance between terminal "+" and "-" of the evaporator temperature sensor. Specification Evaporator core temperature [°C (°F)]Resistance [K?]Voltage [V]-10 (14)43. ...