Has anyone experienced a problem with a P1447 DTC, EVAP Purge Flow Monitor Fault??and what may have cause this?? Thanks for your help in advanced.

Realhp

 

it means a solenoid or valve is malfunctioning(1 check valv 1 purge control valve) an orrifice is blocked ( either the main control orrifice or the secondary purge orrifice) or the control solenoid is shot. most of these valave and orrifices are in the canister. Replace the evap canister, that should solve the problem