Just realized I didn't post this in your DIY thread bc I was looking for my reply - I clicked your link to this one!

Anyway my passenger side AC was starting to blow hotter air during startup, it would take some time to taper off but was never as cold as the driver side - they did the dye test and found a leak in the evaporator so they replaced it. Now it's ice cold!

Not sure about your code, I actually didn't hook up my scanner for this one. My previous code was P0444 which turned out to be emmission evap purge control valve circuit which was stuck open so they replaced that as well.

Looked at the invoice to be more specific:
Fuel Tank Vent Valve (carbon canister) Permanent malfunction
replaced (left)