Canyon, Colorado 2004-2005

Heated Oxygen Sensor

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Removal & Installation




NOTE
When replacing the HO2S perform the following:



A code clear with a scan tool, regardless of whether or not a DTC is set
 
HO2S heater resistance learn reset with a scan tool, where available Perform the above in order to reset the HO2S resistance learned value and avoid possible HO2S failure.
 


NOTE
The oxygen sensor may be difficult to remove when the engine temperature is below 120°F (48°C). Excessive force may damage threads in the exhaust manifold or the exhaust pipe.

Sensor 1


Click image to see an enlarged view

Fig. Disconnecting the engine wiring harness electrical connector-sensor 1



Click image to see an enlarged view

Fig. Removing heated oxygen sensor (HO2S) sensor-sensor 1

  1. Remove the connector position assurance (CPA) retainer.
  2.  
  3. Disconnect the engine wiring harness electrical connector (1) from the Heated Oxygen sensor (HO2S) electrical connector.
  4.  
  5. Remove the HO2S sensor electrical connector from the camshaft cover.
  6.  
  7. Using the Heated Oxygen Sensor Wrench (J 39194-B) remove the HO2S from the exhaust manifold.
  8.  

To install:


CAUTION
Use special anti-seize compound on the HO2S threads. The compound consists of graphite suspended in fluid and glass beads. The graphite burns away, but the glass beads remain, making the sensor easier to remove. New service sensors already have the compound applied to the threads. If you remove an oxygen sensor and if for any reason you must install the same oxygen sensor, apply the anti-seize compound to the threads before reinstallation.

  1. Coat the threads of the HO2S with the anti-seize compound P/N 5613695, or equivalent if necessary.
  2.  
  3. Thread the HO2S into the exhaust manifold by hand.
    NOTE
    Replacement components must be the correct part number for the application. Components requiring the use of the thread locking compound, lubricants, corrosion inhibitors, or sealants are identified in the service procedure. Some replacement components may come with these coatings already applied. Do not use these coatings on components unless specified. These coatings can affect the final torque, which may affect the operation of the component. Use the correct torque specification when installing components in order to avoid damage.

  4.  
  5. Tighten the HO2S to 31ft. lbs. (42 Nm).
  6.  
  7. To complete installation, reverse remaining removal procedure.
  8.  

Sensor 2


Click image to see an enlarged view

Fig. Disconnecting the engine wiring harness electrical connector-sensor 2



Click image to see an enlarged view

Fig. Removing heated oxygen sensor (HO2S) sensor-sensor 2

  1. Raise and support the vehicle.
  2.  
  3. Disconnect the heated oxygen sensor (HO2S) electrical connector (3) from the engine wiring harness connector (1).
  4.  
  5. Using the Heated Oxygen Sensor Wrench (J 39194-B), remove the HO2S from the catalytic converter.
  6.  

To install:


CAUTION
Use special anti-seize compound on the HO2S threads. The compound consists of graphite suspended in fluid and glass beads. The graphite burns away, but the glass beads remain, making the sensor easier to remove. New service sensors already have the compound applied to the threads. If you remove an oxygen sensor and if for any reason you must install the same oxygen sensor, apply the anti-seize compound to the threads before reinstallation.

  1. Coat the threads of the HO2S with the anti-seize compound P/N 5613695, or equivalent if necessary.
  2.  
  3. Thread the HO2S into the exhaust manifold by hand.
    NOTE
    Replacement components must be the correct part number for the application. Components requiring the use of the thread locking compound, lubricants, corrosion inhibitors, or sealants are identified in the service procedure. Some replacement components may come with these coatings already applied. Do not use these coatings on components unless specified. These coatings can affect the final torque, which may affect the operation of the component. Use the correct torque specification when installing components in order to avoid damage.

  4.  
  5. Tighten the HO2S to 31ft. lbs. (42 Nm).
  6.  
  7. To complete installation, reverse remaining removal procedure.
  8.  

 
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