Question about 2005 Nissan Xterra

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Service engine soon indicator on and a buzzing/whining noise.

My service engine soon light has been turning on and off over the last couple of months, but seems to be on consistently now. I parked in my driveway this evening and noticed a kind of high pitched buzzing/whining noise that persisted for maybe 30 seconds then stopped. I have also noticed a clicking noise coming from the same area as the buzzing noise while I'm slowing down from a cruising speed to stop at a light or make a turn. The clicking might be happening the entire time I'm driving, but I can only hear it when I'm slowing down. Both sounds are coming from below the oil cap on the driver's side.

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  • yadayada
    yadayada May 14, 2010

    The check engine light comes only when the computer control unit (called the PCM) senses a fault in the electronic controls of the engine and/or the emission system, there are about 200 possible faults that turn the light on, to know what has developed a problem you must have the system tested, this is called an OBD2 fault code test, Kragen and Autozone parts stores do this testing for free. fore more in depth help try live chat option, this could be a very complicated problem

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I recommend that you take it into auto-zone or a car shop asap. from what you have described the ticking as, it sounds like a bottom knock. as for the whine i don't know.

Posted on May 14, 2010

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