Hyundai Palisade (LX2): Engine Control System / Heated Oxygen Sensor (HO2S)

Hyundai Palisade (LX2) 2020-2026 Service Manual / Engine Control/Fuel System / Engine Control System / Heated Oxygen Sensor (HO2S)

Description and operation

Description
Heated Oxygen Sensor (HO2S), consisting of zirconium and alumina, is installed on both upstream and downstream of the Manifold Catalytic Converter (MCC) to detect the air/fuel ratio and send it to the ECM.
In order that this sensor operates properly, the temperature of the sensor tip must be higher than 370°C (698°F). For this reason, a heater controlled by the ECM duty signal, is built into the sensor.
When the exhaust gas temperature is lower than the specified value, the heater warms the sensor tip.

Hyundai Palisade. Description and operation

Specifications

Specification
Heated Oxygen Sensor (HO2S) [Banks 1, 2 / Sensor 1]
â–· Type : Zirconia (ZrO2) [Linear] Type
â–· Specification
Item
Specification
Heater Resistance (Ω)
 2.4 - 4.0 [20°C (68°F)]
Operation Voltage (V)
 12
pin
 6

Heated Oxygen Sensor (HO2S) [Banks 1, 2 / Sensor 2]
â–· Type : Zirconia (ZrO2) [Binary] Type
â–· Specification
Item
Specification
Heater Resistance (Ω)
 3.3 - 4.1 [20°C (68°F)]
pin
 4

Schematic diagrams

Circuit Diagram

Hyundai Palisade. Schematic diagrams

Repair procedures

Inspection
1.
Switch "OFF" the ignition.
2.
Disconnect the HO2S connector.
3.
Measure resistance between the HO2S terminals 2 and 5 [Bank 1 / Sensor 1, Bank 2 / Sensor 1]
Measure resistance between the HO2S terminals 1 and 2 [Bank 1 / Sensor 2, Bank 2 / Sensor 2]
4.
Check that the resistance is within the specification.
Specification :
2.4 - 4.0Ω [20°C (68°F)] [Bank 1 / Sensor 1, Bank 2 / Sensor 1]
3.3 - 4.1Ω [20°C (68°F)] [Bank 1 / Sensor 2, Bank 2 / Sensor 2]
Removal
1.
Switch "OFF" the ignition and disconnect the negative (-) battery terminal.
2.
Remove the oxygen sensor (B) after disconnect the Connector (A).
Hyundai Palisade. Repair procedures   
•
Note that the SST (Part No.: 09392-2H100 or 09392-1Y100) can be used for removing the heated oxygen sensor.
Heated oxygen sensor :
35.3 - 45.1 N.m (3.6 - 4.6 kgf.m, 26.0 - 33.3 lb-ft)
[Bank 1 / Sensor 1]

Hyundai Palisade. Repair procedures

Hyundai Palisade. Repair procedures

[Bank 1 / Sensor 2]

Hyundai Palisade. Repair procedures

Hyundai Palisade. Repair procedures

[Bank 2 / Sensor 1]

Hyundai Palisade. Repair procedures

Hyundai Palisade. Repair procedures

[Bank 2 / Sensor 2]

Hyundai Palisade. Repair procedures

Hyundai Palisade. Repair procedures
Installation
Hyundai Palisade. Repair procedures   
•
Install the component to the specified torque.
•
Note that internal damage may occur when the component is dropped. If the component has been dropped, inspect before installing.
•
Keep the sensing element and connector free from cleaner, spray or grease as oil substance may cause the sensor to malfunction.
•
Sensor and its wiring may get damaged from contact with the exhaust system (e.g. Exhaust Manifold, Catalytic Converter).
1.
Install in the reverse order of removal.

    Description and operation Description Knocking is a phenomenon characterized by undesirable vibration and noise that can cause engine damage.

    Description and operation Description Installed on the delivery pipe, the Rail Pressure Sensor (RPS) measures the instantaneous fuel pressure in the delivery pipe.

    Other information:

    Hyundai Palisade (LX2) 2020-2026 Service Manual: Heater Core

    Repair procedures Replacement 1. Disconnect the negative (-) battery terminal. 2. Remove the heater and blower assembly. (Refer to Heater - "Heater Unit") 3.

    Hyundai Palisade (LX2) 2020-2026 Service Manual: PTC Heater (Diesel only)

    Description and operation Description The PTC (Positive Temperature Coefficient) heater is installed at the exit or the backside of the heater core. The PTC heater is an electric heater using a PTC element as an auxiliary heating device that supplements deficiency of interior heat source in highly effective diesel engi

    Categories

     
    Copyright © 2026 www.hpalisadelx.com - 0.0138