Yes I have searched and found many, but none relating to my issue. If there is one, I am sorry I didn't find it.
I have 2017 FJ09. 8k miles, all maintenance done at dealer so far since under warranty. Over the winter, My battery died, and would not charge, so I bought a new battery. I had emptied the gas tank so there was no gas in the tank. I changed the battery about a month ago, and have had it on a maintainer since. I filled it up today with 93 fuel, and went for a ride. I didn't notice utnil about 20 minutes in that my check engine light is on.
It is running great, and can't tell any difference in idle, acceleration, or cruising at all from last fall. I have read a few other places that this could be from the battery change and could disappear after a couple cycles of heating up the bike, and it cooling down, so a couple of rides, but I didn't know if anyone else had experience with this.