Evaporative Emissions: ORVR: Description
WARNING: This page is about a different car, the 2004 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
The ORVR (On-Board Refueling Vapor Recovery) system consists of a unique fuel tank, flow management valve (Fig 1 ), fluid control valve, one-way check valve and vapor canister.
To quickly identify a vehicle with the ORVR system, remove the fuel fill cap. If the threads on the fuel fill tube are plastic, the vehicle is not equipped with ORVR. If the threads are stainless steel, the vehicle is equipped with ORVR.