Hyundai Ioniq: Engine Control System / Heated Oxygen Sensor (HO2S). Description and operation

Hyundai Ioniq (AE) 2017-2025 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 Manifold Catalytic Converter. The sensor output voltage 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.Remove the intake manifold. (Refer to Engine Mechanical System - "Intake Manifold")3...

Heated Oxygen Sensor (HO2S). Specifications

SpecificationHO2S [Bank 1 / Sensor 1] Item Specification Heater Resistance (Ω)2.4 - 4.0 [20°C (68°F)]HO2S [Bank 1 / Sensor 2] (Binary Type) A/F Ratio (λ) Output Voltage (V) RICH0...

Other information:

Hyundai Ioniq (AE) 2017-2025 Service Manual: Timing Chain Cover. Repair procedures

RemovalEngine removal is not required for this procedure. • Be sure to read and follow the "General Safety Information and Caution" before doing any work related with the high voltage system. Failure to follow the safety instructions may result in serious electrical injuries...

Hyundai Ioniq (AE) 2017-2025 Service Manual: High voltage shut-off procedures

High Voltage Shut-off Procedures • Be sure to read and follow the "General Safety Information and Caution" before doing any work related with the high voltage system. Failure to follow the safety instructions may result in serious electrical injuries...