Question about 2001 Honda Prelude
Hello: Sir, the 301 is telling you that you have a mis-fire on cylinder #3, You may have a bad spark plug, or bad wire going to #3 plug or you may have a ignition unit that is not firing #3 cylinder, With the #3 cylinder not firing it caused the 420 code that means the catalytic converter to be below acceptable efficiency for emission standards. Repair the 301 before you replace the converter
Posted on Dec 28, 2010
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Posted on Jan 02, 2017
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