Question about 2001 Jeep Cherokee

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Changed the plugs...

I changed the plugs on my Jeep Cherokee Laredo 2001, 4 liter engine, 6 cylinder, but I still have the check engine light on. According to Advanced Auto, the computer logged that there was a missfire in the cylinder. I realize that it could still be the fuel injectors, but another question I have is there any chance that the computer would still keep the check engine light on after I left the battery terminal unhooked after a half hour? I heard that some vehicles need to have an automotive technician reset the computer inorder to clear the light.

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Yes, the code will need to be cleared by the technician.

Usually the check engine light doesn't come back on immediately. However it will store the code until it is cleared by the tech.

If it comes back on immediately, then you have an immediate problem b/c it take a certain number of misfires over a certain number of miles before it trips the code again.

Posted on Feb 10, 2009

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