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I have '03 Honda Odyssey minivan. It started to shake really bad a couple of months ago while drivig on highway. I thought that the engine might stall. I had the engine scanned by Autozone. The report shows that cylinder 1,2,3,4,6 misfiring. I checked spark plugs. They were fine. I replaced 5 ignition coils and cleaned EGR passage and replaced EGR valve. The engine shaking stopped, but check engine light didn't go away. If I disconnect the battery cable for a while, check engine light disappears for a while, but it comes back. Sometimes it flashes. I asked Autozone guy to reset the code, but he says his machine is incapable of doing that. The vehicle runs fine now. I am wondering how to erase the check engine light. Any suggestion?
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