DTC P043E, P043F: Evaporative Emission System Leak Detection Reference Orifice Low Flow; Evaporative Emission System Reference Orifice High Flow: Description
WARNING: This page is about a different car, the 2006 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
The circuit description can be found in the Evaporative Emission (EVAP) system (see EVAP System (2005/05-2006/01) ).