Question about 2000 Jeep Grand Cherokee

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Re: 2000 Jeep Cherokee Laredo (139,000 miles) - Check Engine Light On Good morning, Since 2009, I've been having a problem with my check engine light staying on. The spark plugs, oxygen sensors and breaks were changed in 2008. I took my vehicle back to the place who had initially done the work on my vehicle and they found a few other minor problems that were fixed and said that everything should be okay. After a few days, the check engine light came back on. In August 2010, I decided to take my vehicle to Aamco for a free check engine light test. A code 0387 (I believe) came up and the tech told me that my catilite converter was bad and stated that Jeep is known for this. He said to change the converter would cost me over $1,000 plus labor. He wanted me to bring the car back for further diagnostic testing at a cost starting at $100. I took my vehicle elsewhere and had the catilite converter changed and the muffler as well (since I was told the muffler was leaking air). The check engine light disappeared only to reappear a few days later. Last week, I took my vehicle to Auto Zone. The tech ran a scanner over the vehicle and told me that when the converter was changed the check engine code should have been erased at the sametime. He erased the code for me. Two hours later, the light came back on. Although I love my vehicle, the investment has cost me a fortune. Should I take my car to a Jeep Auto Dealership to have a full diagnostic check done? I use my car daily to transport my children to school, work, etc. I have been unable to get my car inspected because of this and I am afraid that I will eventually receive a ticket. Is this vehicle worth the investment? I purchased it "used" back in 2007. Unfortunately, it did not come with a manual nor am I able to find one online. Your assistance is greatly appreciated. Thank you. MichelleH

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  • michelleh842 Sep 16, 2010

    Thanks so much for your quick response. Everything you have said makes sense. I'm only worried because I don't know how my vehicle will pass inspection if the light remains on. I'll take your advice and take it to the dealership for a diagnostic test and also visit Auto Zone's website. Thanks so much again.

  • michelleh842 Sep 16, 2010

    Yes. Thanks!

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If you car is running good and not causing problems, I honestly wouldn't worry about the lite. Every time something is fixed or replaced that has a sensor or circuit, then the light needs to be reset. If you had the catalytic and muffler replaced and are still getting an exhaust error, then I would test the 02 sensors and egr. Dealerships charge a little more than the average mechanic. But they do guarantee their work which is the big plus. I live in MN and it's $40 here for a diagnostic test.
You can go to autozone.com, register for a free account, then login to the account. Choose vehicle year, make, model, and engine size. Then choose "view repair manual" for a free repair manual.

Posted on Sep 16, 2010

  • Nate Stansfield
    Nate Stansfield Sep 16, 2010

    Not a problem. Thank You for using Fixya! Come back anytime!

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Hope this helps !!
Please rate me good ;o)

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