Check engine light was flashing, pull
Hello, I am looking for some advice. I have a 2020 Odyssey with ~120K miles on it. All of the scheduled maintenance has been performed (timing, spark plugs, etc.). A couple of weeks ago the check engine began to flash while driving, I pulled over and turned the engine off. According to the manual I was to wait 10 minutes, start the van and schedule a visit to the dealership. I did just that, the dealer spent two hours the next morning trying to diagnose why this occurred, found nothing. Dealership comments were, "Scanned vehicle, no codes found. Inspected wiring system, fuel, spark, timing, electrical. Performed output tests and a test drive. Cannot duplicate concern at this time. Vehicle is currently operating as it should". The only comment provided verbally was that it may be running a little rough and try some better fuel. It has been fine until today (~1,500 miles later) when the exact same thing happened. When I got home, I scanned the van, no codes. I pulled 3 spark plug (2 from the front bank, and one from the back) and they looked to have normal use. Anyone have any ideas?