Question about 2002 Jeep Grand Cherokee

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My 2001 Jeep Grand Cherokee has 108,000 miles. The Engine Diagnstic Indicator light came on so I took off a battery terminal for a few moments and reatached it and the light was out for about a day the came on again so I repeated the process and the light went out for about a day and has come on again. What is most commonly wrong in this situation?

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Hi this is telling you , that you have a fault code stored in the ecm, something has gone wrong with a component on your vehicle, it could be serious, or could be simple but you really should get it checked out in case you do some damage to other things, if it still runs ok, with no problems then normally its the H02 oxygen sensor either the one on the exhaust manifold or the one just past the catalytic converter under the vehicle, but you are best getting the error code read and finding out what it really is...hope this helps

Posted on Oct 03, 2010

  • therschleb Oct 25, 2010

    Try replacing the gas cap. I had the same thing happen and the repair shop tried telling my I had the replace the emissions box ($300). I had the replace the gas cap to pass a vehicle inspection and the light went away. Cap is cheap...if it doesn't work then no harm.

  • steve morris
    steve morris Oct 25, 2010

    did you manage to get the error code from the repair shop? did they tell you what it was?



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