I am pretty sure my error code was the P284B which was the shift fork out of position???
The car wouldn't select Reverse and would only travel in Auto mode and select 2nd and 4th gear only!
No idea what the others are. I had to reset/clear the codes twice via COBB AP and the problem never came back again. But I did have SVM open and thoroughly clean the solenoid pack, and change the trans oil whilst giving the car a service.
Have never had the problem since. But then again I am only a 650R - your 1001R is probably putting your transmission through some serious pressure compared to cars like mine.