Kia Sorento 2003-05

Heated Oxygen Sensor

Print

Operation



The exhaust gas oxygen sensor supplies the electronic control assembly with a signal which indicates either a rich or lean mixture condition, during the engine operation.

Removal & Installation



  1. Disconnect the electrical connector from the sensor.
  2.  
  3. Remove the oxygen sensor.
  4.  

To install:

  1. Installation is the reverse of the removal procedure.
    NOTE
    Apply anti-seize compound to the threaded portion of the sensor, prior to installation. Never apply anti-seize compound to the protector of the sensor.

  2.  

Testing



Perform a visual inspection of the sensor as follows:

  1. If the sensor tip has a black/sooty deposit, this may indicate a rich fuel mixture.
  2.  
  3. If the sensor tip has a white, gritty deposit, this may indicate an internal coolant leak.
  4.  
  5. If the sensor tip has a brown deposit, this could indicate excessive oil consumption.
  6.  
  7. Warm the engine until the coolant temperature reaches operating temperature.
  8.  
  9. Disconnect the sensor electrical connector, and using a DVOM mete, measure the resistance between terminal 3 and 4.
  10.  
  11. Specification should be 30 ohms, or more.
  12.  
  13. Replace the sensor, if there is a malfunction.
  14.  
  15. Apply battery voltage directly between terminal 3 and 4.
    NOTE
    Be careful when applying the voltage. Damage will result if terminals 1 and 2 are connected to any voltage.

  16.  
  17. Connect a voltmeter between terminal 1 and 2.
  18.  
  19. While racing the engine repeatedly, measure the output voltage.
  20.  
  21. Specification should be 0.6 volt (minimum) and resistance should be 30 ohm or more.
  22.  
  23. Replace the sensor, as required.
  24.  

 
label.common.footer.alt.autozoneLogo