Kia_Sedona_2002-2006

Heated Oxygen Sensor (HO2S)

Print

Location



The sensors are located in the exhaust system. On some vehicles one sensor is located up at the exhaust manifold(s) and the other sensor is located down at the catalytic converter. On other vehicles both sensors are located down at the catalytic converter.

Testing



2002-2005

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 4 and 3.
  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 4 (power) and 3 (ground).
    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 2 (sensor output)and 1 (sensor ground).
  18.  
  19. While racing the engine repeatedly, measure the output voltage.
  20.  
  21. Specification should be 1 volt.
  22.  
  23. Replace the sensor, as required.
  24.  

2006
Sensor One

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 engine reaches operating temperature.
  8.  
  9. Be sure the ignition is OFF. Disconnect the sensor connector.
  10.  
  11. Check the sensor for damage or contamination caused by foreign substance.
  12.  
  13. If the sensor is not normal, replace the component with a known good one and recheck. Replace the sensor as required.
  14.  
  15. If the sensor is normal, substitute a known good PCM and repeat the test. Replace the PCM as required.
  16.  

Sensor Two

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 engine reaches operating temperature.
  8.  
  9. Be sure the ignition is OFF. Disconnect the sensor connector.
  10.  
  11. Using an ohmmeter, measure the resistance between terminals 1 and 2 (component side).
  12.  
  13. Specification should be 9.6 plus/minus 1.5 ohms at 69.8°F.
  14.  
  15. If not, replace the sensor.
  16.  

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.  

 
label.common.footer.alt.autozoneLogo