Check engine light is coming on for a few seconds, then going off for a while, then popping on, then off for a long while, on ,off, off, off, on ,off. There is no pattern, no issue with the way the bike runs. It was just serviced, new plugs, welded up the cross over pipe as it was cracked, checked the speed sensor in the transmission and it was clean, no codes stored. Am I looking for trouble if I keep running it, should I go back to the dealer? Any input or advise would be greatly appreciated. 2003 FLHTCUI, first 20k were put on by my dad, no issues, this is my second season with the bike and this started at about 23,800, and has been happening for the past 700 miles.