Kia Stonic Quiz
Engine Control System/Fuel System

Heated Oxygen Sensor (HO2S)

In this manual: Engine Control System/Fuel System
General Information — 8Maintenance — 31Engine Mechanical — 49Engine Electrical — 15Emission control system — 11Engine Control System/Fuel System — 45Clutch System — 12Manual Transaxle System — 11DCT (Dual Clutch Transmission) System — 16Drive Shafts and Axles — 9Suspension — 16Steering — 10restraint system — 15Braking system — 22Body (Interior and Exterior) — 89Rear Seat — 16Electrical System — 25Electrochromic Interior Rear View Mirror — 64Heating, Ventilation, and Air Conditioning — 31
11steps
~71min
4/5difficulty
1special tools
02040608010049.136N·mlb·ft
Tightening torque found on this page
Done 0 of 11

Specifications

SPECIFICATIONS

HO2S [Bank 1 / Sensor 1]

Position SPECIFICATIONS
Heater Resistance (Ω) 2.4 ~ 4.0 [20°C]
Type Linear
Handle 6

HO2S (Bank 1 / Sensor 2)

Position SPECIFICATIONS
Heater Resistance (Ω) approx. 9.0 [20 °C]
Type Binary
Handle 4

Description and Operation

Description

The heated oxygen sensor (HO2S) is made of zirconia and alumina and is installed before and after the catalytic converter (MCC). The output voltage of the sensor changes according to the air-fuel ratio.

The sensor must be heated for proper operation. To maintain the temperature, the sensor has a heater which is controlled by the ECM through a duty signal. If the exhaust gas temperature is below the specified value, the heater heats the sensor tip.

Schematic diagrams

Circuit diagram

repair procedures

TEST

  1. Turn the ignition off.

  2. Disconnect the HO2S connector.

  3. Measure the resistance between terminals 2 and 5 [B1/S1] of the HO2S.

    Specification: 2.4-4.0 (20 °C)

  4. Measure the resistance between terminals 3 and 4 [B1/S2] of the HO2S.

    Specification: approx. 9.0 [20 °C]

  5. Make sure the resistance is within specification.

expansion

[Bank 1 / Sensor 1]

  1. Turn the ignition switch OFF and disconnect the negative (-) battery terminal.

  2. Disconnect the sensor connector (A).

  3. Remove the heated oxygen sensor (B).

    Heated oxygen sensor: 39.2~49 N·m

[Bank 1 / Sensor 2]

  1. Turn the ignition switch OFF and disconnect the negative (-) battery terminal.

  2. Disconnect the sensor connector (A).

  3. Remove the heated oxygen sensor (A).

    Heated oxygen sensor: 39.2~49 N·m

Installation

  1. Installation is the reverse of removal.

Test yourself

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