where is it located under the hood?
canister purge valve on 2001 Ford Explorer
I think it is under the battery perhaps even under the fender below the battery. It has two hoses going to it and an electrical connector with two wires a Red and a Light Green/Black.
yes on the engine where is it located
for your vehicle, it can be in the engine compartment or by the canister which is near your fuel tank. it is usually called the vapor management valve ( fancy name for purge valve ) I would look at your under hood Emissions Label, and the under hood vacuum diagrams to locate it. here is a link for repair info for your truck