Auto Trans Problem 4EAT 90 Legacy LS wagon

[terranaj98]

Got my problem diagonsed by both subaru and mister transmission
they both got the code 12 duty solenoid b
so i decided to get mister transmission to replace the solenoid for only 350.
After it runs a little bit better and didnt have any problems.
Yesterday when i got back from my vacation the power light flickered for a good 6-10 seconds. 1/4 sec blinks.
Anything i should worry about?
I might go get it rechecked...for codes.
i had 2 speed sensor codes previously.. but they havent returned. after 2 resets