See the many posts on this subject in "WRX Check Engine Light Log". In particular code#1443.

It seems that, depending on the dealer, some WRX owners are getting blown off completely while others are getting free loaner vehicles while their ECU is sent to be 'reprogrammed'. My dealer has been good so far but claims there is "no problem" as far as SOA is concerned and no Tech Bulletin. I've had two 1443 CEL's so far and the only work that's been done (other than resetting the CEL) was to clean the Vent Control Solenoid connector and pack it with grease.

WHAT's UP? Is this one of those "hidden recalls". Is there a problem or not?

Well, one more visit for you to the dealer for P1443 and your car will qualify as a 'lemon' under most state lemon laws (not sure about MD, though). Mention that to the dealer and I bet you get a more thorough inspection.

I've had the vent solenoid CEL,
I was told to not fill the tank to the brim but to just put enogh to almost fill. The excess gas overflows the venting system..