I should probably include that the engine was put in 3 months ago. And has been running fine till the initial issue of the transmission not down shifting to 2nd when slowing to make a turn. That spurred on the solenoid swap. Also to reference your engine and trans question. I purchased the engine prepulled so I had to use my transmission. When I got this car it had a blown motor. So far I have nursed this thing back to health. And then the trans gave me fits. And here we are. As for the throttle body I ordered one 3 weeks ago and they are on national back order till may. Good thing the focus isn't my daily driver.
As for other tests that I can do I haven't had the opportunity to do any of it yet. Easter apparently I have to do stuff with family.... :(
Edit: no codes showing I check every chance i get or test drive of 15 min or more