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Old 09-02-2013, 02:34 PM
dfresh dfresh is offline
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Join Date: Aug 2013
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Default Re: P04020 Engine Code

Excellent information I was looking for something a little more simplified, I will check other threads on this PO420 code. I was just wondering if an ill running vehicle (bad plugs and wires) could have fouled up some sensor , because that is when I started getting this code
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