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2004 Toyota Corolla check engine light is on but car is running fine, anyone know why?

My '04 Corolla has 54,002 miles on it and the check engine light came on this morning when I started it, and it has stayed on. It is running fine and all fluids are full. It's not making any strange noises and has no performance problems. Does anyone have any idea why the light is on?

8 Answers

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  • alvarz
    Lv 6
    1 decade ago
    Favorite Answer

    oil change due?

  • 6 years ago

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    RE:

    2004 Toyota Corolla check engine light is on but car is running fine, anyone know why?

    My '04 Corolla has 54,002 miles on it and the check engine light came on this morning when I started it, and it has stayed on. It is running fine and all fluids are full. It's not making any strange noises and has no performance problems. Does anyone have any idea why the light is on?

    Source(s): 2004 toyota corolla check engine light car running fine why: https://tinyurl.im/kjSJb
  • Anonymous
    1 decade ago

    there are over 60 sensors with hundreds of combinations

    turn the key on off 3 times ending with it on in 10 seconds and you will get the codes on your odometer and you can check on the internet for the meaning at a car site

  • jack w
    Lv 4
    1 decade ago

    Your engine threw a code that usually an auto parts store will read for you for free. My guess would be that you are in need of an oxygen sensor(s). good luck

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  • Anonymous
    5 years ago

    For the best answers, search on this site https://shorturl.im/avuOE

    Take it into the shop. The light is there for a reason...to let you know something is wrong when you might not see it.

  • Anonymous
    1 decade ago

    It could be one of many things and you need to have it scanned as soon as possible just in case, better safe than sorry.

    Source(s): 923
  • 1 decade ago

    Perhaps its odometer's tripped the light to alert you that scheduled maintainence is due.

  • BFH
    Lv 6
    1 decade ago

    Because the computer is very good at determining when there is a problem, even when the driver is oblivious.

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