Question about 2003 Chevrolet Cavalier

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Unhooking Battery Cables

I need to reset the system on my 2003 Cavalier. I was told to unhook the cables from the battery for around 5 minutes to do so. I can not figure out how to unhook the cables.

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  • gfbattousai May 27, 2009

    Well I just recently had the spark plugs and fuel filter replaced, and the check engine light came on the next day. The car seems to be running fine. I have had the car scanned before when the light was on by random, and it said something about an o2 filter. I've been told that, that is a pretty common thing to come up on Cavaliers.
    And I've just been told that unhooking the battery would clear that check engine light.


  • Richard Scordino May 11, 2010

    Cable ends are attached by two 5/16 fasteners (one on each) Remove negative first, Positive goes back on first.

  • johnny wyatt
    johnny wyatt May 11, 2010

    What are you trying to do that you need to reset the computer?

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Unhooking the battery won't clear the code it's still stored in the hard set memory go to shcucks and have them scan the computer ask them to see if the codes are cleared if not you can clear them they can't it is an OBDII car once you have cleared the problem drive it and see if it comes back, be sure to get the codes printed out before clearing the codes the mechanic will need them if it comes back, there are hard codes and soft codes soft codes can be reset by unhooking the battery but not hard codes. Don't bother with unhooking the battery.

Posted on May 27, 2009

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