Kia Amanti 2004-06

Heated Oxygen Sensor

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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 measure the resistance between terminal 3 and 4.
  10.  
  11. Specification should be as follows:

    Bank 1 Sensor 1, resistance 3.3 kohms
     
    Bank 2 Sensor 1, resistance 3.3 kohms
     
    Bank 1 Sensor 2, resistance 6.0 kohms
     
    Bank 2 Sensor 2, resistance 6.0 kohms
     

  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).
  22.  
  23. Replace the sensor, as required.
  24.  

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. Connect the scan tool and monitor sensor operation.
  10.  
  11. Verify that the signal is switching from rich (above 0.45 volt) to lean (below 0.45 volt) a minimum of 3 times in 10 seconds (voltage will vary between 0.1-0.9 volt).
  12.  
  13. If within specification, check the PCM as follows, ignition OFF. Connect the scan tool. Turn the ignition ON. Select simulation function on the scan tool. Simulate voltage at terminal 1 of the sensor connector.
    NOTE
    Never simulate voltage over 1 volt, because output voltage range of the sensor is 0.1-0.9 volt.

  14.  
  15. If the signal voltage value does not change, substitute a known good PCM and repeat the test. Replace the PCM as required. If the signal voltage value does change, check connectors for looseness, poor connection, binding etc. Correct and retest.
  16.  
  17. If the signal readings are not within specification, check the sensor for contamination, deterioration or damage.
  18.  
  19. Substitute the sensor with a known good component, check for proper operation. If problem corrected replace the sensor.
  20.  

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. If the sensor is physically okay, check the PCM as follows, ignition OFF. Connect the scan tool. Turn the ignition ON. Select simulation function on the scan tool. Simulate voltage at terminal 1 of the sensor connector.
    NOTE
    Never simulate voltage over 1 volt, because output voltage range of the sensor is 0.1-0.9 volt.

  8.  
  9. If the signal voltage value does not change, substitute a known good PCM and repeat the test. Replace the PCM as required. If the signal voltage value does change, check connectors for looseness, poor connection, binding etc. Correct and retest.
  10.  
  11. Using an ohmmeter, measure the resistance between terminals 3 and 4 (component side).
  12.  
  13. Specification should be 7-40 ohms at 68 degrees F.
  14.  
  15. If not, replace the sensor.
  16.  

 
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