Another one to file under, “Is it Hardware/Is it Software/Is it a Network Problem?” In this very helpful post from Bob in Massachusetts, he walks through his diagnostic process on a 2009 Accord that had a previous unsuccessful repair attempt. Based on an initial review of vehicle data, he thought that the problem was hardware related, suspecting a possible bad coil. Further investigation led him in another direction, causing him to suspect a software issue. He completed the fix and corroborated his diagnosis with a TSB covering the original complaint.
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