Question about 2002 Pontiac Grand Am

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All of a sudden my check engine light came on and my transmission began shifting hard. I had the fluid drained and a diagnostic ran on the car but they could not determine the problem or if the check engine light and hard shifting were related. What could cause this to happen all of a sudden?

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  • jongrupp349 Sep 02, 2010

    I had that scan done and they could not tell me what was wrong.



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Yes, Check engine light is usually ON when there is a problem with the car. I am pretty sure that the check engine light is due to the transmission problem you might have observed. What you need to do is to take the car to Autozone ( make sure when you take your car to autozone - check engine light should be there ).They would scan the car for error codes.They usually won't charge anything. Once you get the car scanned, print the error codes that would tell you what went wrong and how you need to fix it.

Take a look at :-

Once scanned, you could always post the code, so that we could tell you what might needs to be done.

Let me know,if needed further assistance.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

Posted on Sep 02, 2010

  • taran_2005
    taran_2005 Sep 02, 2010

    Thanks for your response!!

    If the check engine light is ON - it indicates that the error code is stored in the memory of the car computer. If there are no codes, even though check engine light is ON - it would completely change the diagnostics that we need to follow.

    I have never seen a case where transmission is causing a problem , check engine light is ON and still no error codes????

    Kindly confirm the same with autozone guy. You need to scan the car when the light is ON.

    Let me know the update when you are done.

    Hope i helped you.

    Thanks for using ' Fixya ' and have a nice day!!



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