Codes U0284, U1040, U1044, U1051, U1000, Front grille shutter issue?

My vehicle has code U0284 (on cheap code reader). I paid an independent shop for a diagnosis, they also said it has code U1040, U1044, U1051 and U1000 linked to the ". Active grille shudder system." (his words) and that the grille shutter assembly needs to be replaced.
Their repair price was $1,000.00. I denied the repair.

I discovered if I close the shutter flaps manually and clear codes. I can drive around and turn the car on/off. No code returns. Normally the code appears instantly. I was very excited.

When I park the car for a few minutes, immediately when I start it up the flaps fully open and the code returns. It seems manually closing the flaps delayed the code coming back.

This is confusing, because the motor does open the shutters. Maybe the code appears when it fails to close the flap when I start up the car? Does it even try to do that though?
If I unplug the shutter actuator, I still have the battery light on dashboard and U0284 code.

The other codes he mentioned are worrying. Mechanic stated no communication with assembly.

Has anybody delt with this before?

Thanks so much in advance for anybody's input and your time!

Have a great day!