From time to time I get a Pre-Safe Unavailable error on the display. This usually happens when starting from a stop. I hear a noise and feel a jerk in the car like a hard gearshift. The car continues to drive, but it does not shift gears. It seems to me that it stays in 3rd gear. If I stop turnoff the engine and restart the problem goes away.

I will appreciate any ideas on what to look for.