Question about 2002 Kia Rio

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I noticed the check engine light come on today while being on the parkway going over 55. It seems like being on parkways for long distances I would get the check engine light. If I go back to regular street driving, the light goes off. I used a ODBII diagnostic and I got a Knock Sensor code. I have like 144,300 miles. Am I best off trying a higher octane gas or should I replace the knock sensor? The knock sensor hasn't been replaced yet. I had the timing belt replaced at like 67000 miles and change.

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  • Joseph Murphy
    Joseph Murphy Dec 31, 2010

    I think it was PO325, but I'm not positive. I haven't seen the check engine light come back on yet.

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Hi

it may well be time for a new knock sensor with them miles, also check the MAF sensor. Changing this now will save you money in the long run as the cars engine will run smoother. it could just be dirty so it's up to you if you want to try cleaning it first.

Hiope this helps
Regards

Dan

Posted on Dec 31, 2010

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  • Master
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Higher octane fuel will not cause the knock sensor code to disappear. The code is stored in memory most likely due to a fault with the sensor itself. What was the code number?

Posted on Dec 31, 2010

  • GetMeOttaHere Dec 31, 2010

    The code is directly related to the knock sensor circuit. The PCM monitors the voltage to and from this sensor and the PCM has detected poor communication and/or voltage from the sensor/ Replace the knock sensor. If you would like to test it, I have listed procedures below. I rarely test a sensor when I suspect it to be defective, but I listed the procedure's anyway.





    Testing




    1. Disconnect the sensor electrical connector.
    2. Remove the sensor from the engine.
    3. Mount the sensor in the jaws of a bench vise.
    4. Connect a voltmeter between terminal 1 and 2.
    5. Wrap the bench vise sharply with a hammer and note the voltmeter reading.
    6. Verify that the voltage spike is less than 1 volt.
    7. If no voltage spike is observed, replace the sensor.



    Removal & Installation





    1. Remove the intake manifold support bracket.
    2. Disconnect the sensor connector.
    3. Remove the sensor from its mounting.

    To install:



    1. Installation is the reverse of the removal procedure.
    2. Tighten the sensor to 12-18 ft. lbs.


  • GetMeOttaHere Jan 08, 2011

    Has your issue been resolved?

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