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Hi Everyone: This Toyota Echo has three codes, P0440 the evap system, P0441 Incorrect purge flow and P0446 evap vent control circuit.When you have these three codes the Diagnostic Information states to start with P0441. As you can see in the video there are several visual problems that you don't need a smoke machine to find.For more information be sure to visist: www.johnsadlersautorepair.com