Kia Picanto: Engine Control System / Heated Oxygen Sensor (HO2S)

Kia Picanto JA 2017-2022 Service & Repair Manual / Engine Control / Fuel System / Engine Control System / Heated Oxygen Sensor (HO2S)

Specifications
Specification
HO2S [Bank 1/Sensor 1]
Item
Specification
Heater Resistance (Ω)
2.5 - 4.0 [20°C(68°F)]
Type
Linear
Pin
6

HO2S [Bank 1/Sensor 2]
Item
Specification
Heater Resistance (Ω)
Approximately 9.0 [20°C(68°F)]
Type
Binary
Pin
4

Description and operation
Description
Installed in both upstream and downstream of the Manifold Catalytic Converter, the Heated Oxygen Sensor (HO2S) consists of zirconium and alumina. The sensor output voltage varies in accordance with the air fuel ratio.
The sensor must be heated in order to operate properly. To keep it heated, it is equipped with a heater controlled by the ECM via a duty cycle signal. When the exhaust gas temperature is lower than the specified value, the heater will warm up the sensor tip.

Schematic diagrams
Circuit Diagram
[A/T]

[M/T]

Repair procedures
Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the HO2S connector.
3.
Measure resistance between the HO2S terminals 2 and 5 [B1/S1].
Specification : 2.4-4.0 [20°C(68°F)]
4.
Measure resistance between the HO2S terminals 3 and 4 [B1/S2].
Specification : Approximately 9.0 [20°C(68°F)]
5.
Check that the resistance is within the specification.
Removal
   
Note that the SST 09392-1Y100 can be used for removing the heated oxygen sensor.
[Bank 1 / Sensor 1]
1.
Turn the ignition switch OFF and disconnect the battery negative (-) terminal.
2.
Disconnect the connector (A).
3.
Remove the heated oxygen sensor (B).
Heated oxygen sensor:
39.2 - 49.1 N·m (4.0 - 5.0 kgf·m, 28.9 - 36.2 lb·ft)

[Bank 1 / Sensor 2]
1.
Turn the ignition switch OFF and disconnect the battery negative (-) terminal.
2.
Disconnect the connector (A).

3.
Remove the heated oxygen sensor (A).
Heated oxygen sensor:
39.2 - 49.1 N·m (4.0 - 5.0 kgf·m, 28.9 - 36.2 lb·ft)

Installation
   
Install the component to the specified torques.
Note that internal damage may occur when the component is dropped. If the component has been dropped, inspect before installing.
DO NOT use a cleaner, spray, or grease to sensing element and connector of the sensor as oil substance may degrade the sensor performance.
Sensor and its wiring may get damaged by contacting with the exhaust system (Exhaust Manifold, Catalytic Converter, etc.).
1.
Install in the reverse order of removal.
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