Toyota Echo Problem
 

2000 Toyota Echo just over 80K.

Drives for about 100-150 miles and then throws

P0440 - Evap
P0441 = Evap Purge Flow
P0446 - Emissions Vent Circuit

Monitoring status shows good for evap. No noticable problems with the
engin with driving.

I of course don't have a book for this model, so any suggestions
appreciated.

thanks,
Andrew