Hyundai Sonata: Engine Control System / Heated Oxygen Sensor (HO2S) Description and Operation

Hyundai Sonata LF 2014-2019 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 “Intake And Exhaust System” in EM group). 3. Disconnect ...

Heated Oxygen Sensor (HO2S) Specifications

Specification HO2S [Bank 1/Sensor 1] (Linear type) ItemSpecificationHeater Resistance (?)2.4 ~ 4.0 [20°C(68°F)] ItemSpecificationHeater Resistance (?)Approx. 9.0 [20°C(68°F)] HO2S [Ba ...

Other information:

Hyundai Sonata LF 2014-2019 Owners Manual: AUTO HOLD
This feature keeps the brake applied when the shift lever is in D (Drive), N (Neutral) or Manual shift mode with the feature enabled and when the brake pedal has been depressed to stop the vehicle. To apply: 1. Press the [AUTO HOLD] switch. The AUTO HOLD indicator will illuminate white and the s ...

Hyundai Sonata LF 2014-2019 Service Manual: Description and Operation
Description The changed position of the seat by memorizing into the power seat unit with IMS switch controlling the optimal seat position set by the driver can be restored with the IMS switch. It has the function of prohibiting the restoring action during driving and emergent stopping the l ...