P0441 and its possible causes

I need a bit of help with the P0441 - EVAP incorrect purge flow code. This code popped up after getting the prius running after literally being left Resting in Pieces in my back yard for over 3 months. After clearing with an OBD scan tool yesterday, it popped up again this morning. Personally, I think its bad gas and I just retightened the gas cap this afternoon after clearing the code again. I plan to run the tank out for another 50 or 60 miles before refilling with fresh gas and hope that's the issue.

Some more symptoms (or imagination, its been forever since i drove it) are:
1) ICE seems to stay on when decelerating from 60 + MPH to about 25/35 MPH
2) MPG sucks at 33 to 35, but also old gas and really heavy foot to burn it all faster in my short 22 mile round trip commute.
Maybe not related, but I Had to replace the 12v battery, so i got a Duralast from Autozone


But i have my doubts. The prius is a 2011 with 223,000 miles and barely preformed a (terrible cleaning) on the egr and a great clean of the intake manifold. I've also added a oil catch can, even though the prius only goes from max fill to min fill on the dipstick in about 5,000 miles.

 

P0441 Codes by 40mpgnot40mph posted Jun 22, 2021 at 6:14 PM

I also got a screenshot of the the 2 times i got the code. Both occurred in the morning, after leaving the car off overnight, but after driving a few miles.