need help

i'm back to my project 8HP70 on 2JZ after few moment and problems with can communication resolved...
now i have problems with error code (20) (speed sensor) and when i shift to drive, the gear target on tuner pro is blocked on 6. Impossible to change. on LCD it's M6
Do you know what can i do?
another problem, i have the number 1 in save mode case.
Any help will be greatly appreciated
kind regards