"Check Engine" light won't extinguish

Discussion in 'General Motoring' started by Just ole Joe, Nov 13, 2005.

  1. Just ole Joe

    Just ole Joe Guest

    The "Check Engine" light has been on on my 1990
    Hyundai Excel GL (that's not a typo, I bought it
    new in October of the beginning of the last decade
    of the last century :O)) for several years.

    Hope you've stopped laughing by now.. but it's
    true, and the dealer can't get the computer chip
    code to figure out why it won't go out. The car
    runs great and I've kept up with all the recommended
    service and various repairs here and there (I won't
    list them, but a valve job was The Biggy last year
    and the Second Biggy at about 5 years old was the
    fuel pump) and the new Midas muffler every 18
    months or so (free on Lifetime Warranty), etc.

    I've had various mechanics scratch their heads and
    say, "Well, if it's running right and the light
    won't go out maybe you should just disconnect the
    lamp in there."

    It's a minor annoyance given the car's so good to
    me. But I like tinitis in my ears to be the only
    thing I can't do anything about as far as annoyances
    go. :O)

    Any ideas?

    -- Just Joe
    Just ole Joe, Nov 13, 2005
  2. Just ole Joe

    Guncho Guest

    Gas cap loose?

    Guncho, Nov 14, 2005
  3. Just ole Joe

    hyundaitech Guest

    If you go to www.hmaservice.com, the service manual should list a procedure
    to get the code from the diagnostic link in the fuse box. You'll need to
    monitor voltage pulses on one of the terminals. I recall it's one of the
    corner terminals. You'll have a series of long pulses followed by a
    series of short pulses making a two-digit code. From there, we can
    surmise about the cause.
    hyundaitech, Nov 14, 2005
  4. Just ole Joe

    halatos2000 Guest

    halatos2000, Nov 14, 2005
  5. I had the same issue with my '94. I drove it that way for two years. The
    dealer checked it a couple of times when I had the car in for the state
    inspection, but couldn't get any useful codes. He would reset the CEL,
    then it would come back on within a few days...or minutes. Occasionally,
    it would go out by itself. Like your car, it ran fine, so I just ignored
    it. It was still on when I sold it earlier this year and still running
    like a top.
    Brian Nystrom, Nov 14, 2005
  6. BTW, when I checked the codes myself, all I ever got was something to do
    with the EGR. I went over the EGR system and couldn't find anything wrong.
    Brian Nystrom, Nov 14, 2005
  7. Just ole Joe

    Just ole Joe Guest

    Thanks for your responses.

    Now I'm fantasizing about figuring out how to unplug that particular
    lamp without undoing the other, useful ones.

    It's a '90, as I say, so I don't mind doing without the functionality
    of the "check engine" lamp.

    Know how to undo it?

    - Joe
    Just ole Joe, Nov 14, 2005
  8. Just ole Joe

    hyundaitech Guest

    Usually, the temp sensor in the egr valve failed. The computer monitored
    the temp in the egr valve to determine whether the valve was working.
    hyundaitech, Nov 14, 2005
  9. Just ole Joe

    Jozef Guest

    My engine light came on at 130,000 miles. The local garage couldn't get any
    useful info on the codes. The car is a 1996, Hyundai Accent, now with
    202,600 miles on it. Runs as good as the day I bought it new. And, the
    engine light is still on. And yes, I have changed gas caps.

    Jozef, Nov 15, 2005
  10. Just ole Joe

    Jody Guest

    Jody, Nov 15, 2005
  11. Thanks! I'll bet that was the problem I had. I no longer have the car,
    but it's nice to know that it WASN'T anything important.
    Brian Nystrom, Nov 15, 2005
  12. My sister liked hers until the paint started peeling off the hood. Looks
    like yours had the same issue. It's too bad, since they've improved so
    much over the years. I was happy enough with my Excel that I replaced it
    with an Elantra. My mother bought a Sonata and loves it. My sister is
    still pissed at Hyundai and drives Dodges. Her loss...
    Brian Nystrom, Nov 15, 2005
  13. Just ole Joe

    Just ole Joe Guest

    Yeah, her loss, also because in the price range of Hyundais they
    really hold their ground against other automobiles of most other

    This '90 Excel GL I bought new has its rattles and squeaks, but it
    always starts up in the Winter and the mileage is great (especially
    since the valve job several months ago): 34 around town and 37 on
    long trips.

    The 1.5 liter engine isn't a powerhouse by any means, but it holds
    its own and does 75 or 80 humming right along for hundreds of miles
    on Interstate 80.

    I'll keep it until it gets wrecked or I can't drive anymore. :O)

    -- Joe
    Just ole Joe, Nov 16, 2005
  14. Believe it or not, my Elantra GT hatchback 5 speed will equal or even
    slightly better that highway mileage @65 mph, using the cruise control
    as much as possible. I routinely average over 34 mpg combined. I guess
    it must be due to advances in engine technology, but I'm always
    impressed when a car exceeds it's EPA ratings.

    Because it's a larger, heavier car with a bigger engine, it won't equal
    the Pony/Excel/Accent in city mileage, but that's no surprise.
    Brian Nystrom, Nov 16, 2005
  15. Just ole Joe

    Jody Guest

    ha ha does she have anyidea how doges ive seen that have peeled paint down
    to the primer? lots...
    my old cars paint was plain worn out, moss growing on the hood =)
    Jody, Nov 16, 2005
  16. Just ole Joe

    Just ole Joe Guest

    My only regret is getting the automatic instead of the stick in
    my '90. I could be getting even better mileage. But, hey, I went
    from a 1980 Chevy Silverado pickup, at 12 to 15 mpg, to the Hyundai,
    so the appreciation level was high immediatly. :O)

    -- Joe
    Just ole Joe, Nov 17, 2005
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