Where is the expansion valve located on a 2000 Toyota Sienna?

The expansion valve on a 2000 Toyota Sienna is located within the vehicle's HVAC system, typically found near the evaporator core inside the dashboard. To access it, you'll need to remove the dashboard and possibly the HVAC housing assembly, as the valve is not easily accessible from the engine compartment. It's essential to handle this procedure carefully to avoid damaging any components.