Yep, the car crapped out again this morning. Ran fine on the way home from the dealer yesterday and to breakfast today, but not after breakfast. Maybe I can’t drive the car on Fridays.
This confirms to me that the car needs a new ECU. The dealer replaced the battery, the alternator (at my suggestion), the fuel rail sensor and the fuel pump; the fact that the same error occurred today means the main “brain” of the car is fried.
I did not accompany the Z06 to the dealer; I might have punched someone.