[mptoledo]

Here is what I would do if it was my car if nothing seemed wrong except dummy lights.

1.) check fluids to make sure oil is clean and not mixed with coolant. and check for leaks on the floor.
2.) check fuses.
3.) if fuses are ok then unhook battery for an hour.
see if that fixes it. run car gingerly and log everything that isn't normal, on your way to AZ to get the codes read.

I know this is a sophisticated piece of machinery, but at our dealership were I worked this is what we did to see if it was just a hiccup in the cpu. Especially if the only sypmptoms were only a dummy light.

Disclaimer. At our dealership, if there was a problem we would fix it the right way. Its just the damn check engine lights would come on if you let some cars sit too long, if you started it up and turned it off too many times to just move it around the lot and other various reasons.