2005 highlander has codes po441, po442 & po446

Question

She did get stuck in some icy, slushy snow last winter, is it possible that a vacuum hose may be loose & cause all 3 codes. They all appeared together.

Answer 1

P0441 Evaporative emission incorrect purge flow

P0442 Evaporative emission control system leak detected (small leak)

P0446 Evaporative emission control system vent control  circuit malfunction

That's true you just have a line disconnected, simple reconnect, a P0441 which is a incorrect purge flow will set a P0446 and vent control malfunction, Look at the air filter area for any emission hose that may have disconnected.

 Here a typical EVAP hose that got disconnected during a air filter change the code that were set where P0441, P0446 and P0442