Ok, I have checked out the code.

The only code that flashes is 43. My Haynes manual only goes up to 42.
Anyone knows what this is?

I did clear the code after checking it by pulling the fuse. This morning
on the way to work, the check engine light came on again a little over 20
minutes into my commute. A little later, I stopped, turned the engine
off, and restarted. The light didn't come on. I am sure it will probably
come on again on my way home. (Has done this for the last 3 days.)