Lexus NX: Heated Oxygen Sensor

Components

COMPONENTS

ILLUSTRATION

*1

FRONT EXHAUST PIPE SUB-ASSEMBLY

*2

HEATED OXYGEN SENSOR

*3

COMPRESSION SPRING

*4

GASKET

N*m (kgf*cm, ft.*lbf): Specified torque

*

For use with SST

Non-reusable part

-

-

Removal

REMOVAL

PROCEDURE

1. REMOVE FRONT EXHAUST PIPE SUB-ASSEMBLY

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2. REMOVE HEATED OXYGEN SENSOR

(a) Using SST, remove the heated oxygen sensor.

SST: 09224-00011

Inspection

INSPECTION

PROCEDURE

1. INSPECT HEATED OXYGEN SENSOR

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 (HT1B) - 2 (+B)

20°C (68°F)

9 to 14 Ω

If the result is not as specified, replace the heated oxygen sensor.

*a

Component without harness connected

(Heated Oxygen Sensor)

Installation

INSTALLATION

CAUTION / NOTICE / HINT

HINT:

Perform "Inspection After Repairs" after replacing the air fuel ratio sensor.

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PROCEDURE

1. INSTALL HEATED OXYGEN SENSOR

*a

Torque Wrench Fulcrum Length

HINT:

Perform "Inspection After Repairs" after replacing the air fuel ratio sensor.

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(a) Using SST, install the heated oxygen sensor to the front exhaust pipe sub-assembly.

SST: 09224-00011

Torque:

Specified tightening torque

44 N*m (449 kgf*cm, 32 ft.*lbf)

NOTICE:

Replace with a new part if it is dropped or if it receives a strong impact.

HINT:

  • Calculate the torque wrench reading when changing the fulcrum length of the torque wrench.

    Click here

  • When using SST (fulcrum length of 30 mm (1.18 in.)) + torque wrench (fulcrum length of 180 mm (7.09 in.)): 37.7 N*m (384 kgf*cm, 28 ft.*lbf)

(b) Connect the heated oxygen sensor connector.

2. INSTALL FRONT EXHAUST PIPE SUB-ASSEMBLY

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3. INSPECT FOR EXHAUST GAS LEAK

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