Sonata GLS Problem

Discussion in 'Hyundai Sonata' started by Old_Timer, Aug 22, 2004.

  1. Old_Timer

    Old_Timer Guest

    My 2000 Sonata GLS V6 (36,000 miles) showed a problem when I started
    it today. At idle the engine sounds as if it is misfiring or it is
    running very rich. The engine idles with a vibration. The Check
    Engine Light is on. This is a week end so I have not yet taken it to
    the dealer for a diagnostic.

    Are the symptoms I described typical for a failed oxygen sensor????

    Old_Timer (Who misses the old DIY days)
     
    Old_Timer, Aug 22, 2004
    #1
  2. Old_Timer

    Harry Smith Guest

    ========
    Could be -- a failed O2 sensor will cause the computer to make
    adjustments in the engine parameters. However, it sounds more like a
    plugged catalytic converter -- although that would be surprising at such
    a low mileage. Any chance that leaded fuel was put in at any time
    previously?

    Good luck,
    Harry
     
    Harry Smith, Aug 22, 2004
    #2
  3. Old_Timer

    Chynna22 Guest

    Could be the oxygen sensor, or it could be a bad spark plug. Mine had the
    platinum ones, but one did not last the length it was supposed to. Thank you
    Hyundai warranty. Also, had a spark plug wire go out too.

    Steve
     
    Chynna22, Aug 23, 2004
    #3
  4. Old_Timer

    BillyGoat Guest

    I would suspect plug wire first. that's the only thing that I have had
    problems with on my 99. Take it to Auto zone and let them read out the code
    for you free. If its a 301-306, its a plug or plug wire(most likely)
    bill
     
    BillyGoat, Aug 23, 2004
    #4
  5. The Commander, Aug 23, 2004
    #5
  6. Old_Timer

    Nick Guest

    Agreed. You are still covered under the warranty period so take it to
    the dealer and have them handle it. It is most likely either the spark
    plug wires or a bad spark plug (happened to my sister's 99 Elantra at
    55k). Try clearing out the ECU by pulling the battery for a few
    minutes. If it is a bad O2 sensor, the check engine light would come
    on after a few minutes and not when the car starts up.

    Nick
     
    Nick, Aug 23, 2004
    #6
  7. Old_Timer

    hyundaitech Guest

    No. Don't clear the code. This helps provide information to whomever
    diagnoses the car. And, if it's the O2 sensor, the lamp may not come on
    again for days.
     
    hyundaitech, Aug 23, 2004
    #7
  8. Old_Timer

    Old_Timer Guest

    I took the car to the dealer this Monday morning. I told the service
    manager that my guess (from my DIY days) was a bad plug wire. It
    was the #2 plug wire and the dealer replaced the set of ignition
    wires. I found out that there was a recall for oxygen sensors and two
    were replaced and the ECU reprogrammed.
    The dealer also found a code for the Trans Range Switch and replaced
    that item as well.

    All covered under warranty.

    Old_Timer
     
    Old_Timer, Aug 24, 2004
    #8
  9. Old_Timer

    Nick Guest

    I'm not that knowledgeable about what cost Hyundai charges to check
    and reset the ECU however on Honda's it is always a good idea to reset
    the ECU in case there is any false error because you'll end up paying
    the bill if it was a simple reset. If there is a problem, the light
    will come back again.

    Nick
     
    Nick, Aug 26, 2004
    #9
  10. Old_Timer

    Nick Guest

    Good news to know...it looks like you are fixing the same parts that I
    had to fix on my sister's Elantra. Could be a supplier defect?

    Nick
     
    Nick, Aug 26, 2004
    #10
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