Kia Sportage 1998-02

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. Run the engine at idle speed.
  10.  
  11. Connect a voltmeter between terminal 4 (blk) and ground.
  12.  
  13. Increase and decrease the engine speed quickly several times.
  14.  
  15. Specification should be 0-1.0 volt.
    NOTE
    The rear sensor voltage does not fluctuate as quickly as the front sensor.

  16.  
  17. If not as specified, inspect the on-board diagnostic system, exhaust system, intake manifold system and fuel line pressure.
  18.  
  19. If all systems are normal, replace the sensor.
  20.  
  21. To check the heater, be sure that the ignition switch is OFF.
  22.  
  23. Disconnect the sensor connector from the wire harness, if not already done.
  24.  
  25. On 1996-1997 vehicles connect an ohmmeter between terminals 1 and 3. Measure the resistance. Specification should be approximately 6 ohms at 68 degrees F.
  26.  
  27. On 1998-2002 vehicles connect an ohmmeter between terminals 2 and 4. Measure the resistance. Specification should be approximately 5 ohms at 68 degrees F.
  28.  
  29. If not as specified, replace the sensor.
  30.  

 
label.common.footer.alt.autozoneLogo