valve and canister vent shut valve located?
Got a code PO497 Evap Emission Low Purge Flow Fault. Where is the canister purge on 2005 Honda Civic
Could be a 'false code' due to a leaking fuel tank pressure sensor (among other things). Recommend following globalhelpers advice and have a shop you trust do proper diagnostics to verify. If you want to skip that for the first 'go-round' then look down past the IAT (intake air temp.) sensor plug on the end of the air filter housing (drivers side) and the purge solenoid is mounted there , 1 hose in , 1 hose out , and the electrical connector. good luck.
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THESE ARE BIG TIME ISSUES AS FAR AS DIAG AND REPAIR. REC YOU HAVE IT DONE BY YOUR MECH