Check Engine Light Clears Itself?
12-15-2010, 08:11 PM
#1
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Year: 1998
Model: Cherokee
Engine: 4.0HO
Check Engine Light Clears Itself?
Is it normal for a CEL to just go away? I was showing a P0420 code for about a week and then it just went away in its own. I didn't do anything to it. Is this normal? Or is it a sign of a worse/bigger problem?
12-15-2010, 10:19 PM
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Year: 1996
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yes it does, if the condition that caused it to trigger is intermittent and stops after a few service cycles the light goes out, the code will remain stored.
12-16-2010, 06:46 AM
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Year: 1999
Model: Cherokee
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As mentioned, the fact that the light is going on and off indicates that you are marginal on the signals that trigger this light.
P0420 is a catalytic converter efficiency code. It could mean that your catalytic converter is failing or it could be a failure of the after cat oxygen sensor itself.
P0420 is a catalytic converter efficiency code. It could mean that your catalytic converter is failing or it could be a failure of the after cat oxygen sensor itself.
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