2003 Tacoma P0441,P0442,P0446 codes

Question

2003 Tacoma with 135xxx miles; Getting P0441,P0442,P0446 codes; Replaced Charcoal canister with OE from Toyota & codes all come back after a couple of days; Gas cap appears to be fine & so do vacuum hoses. At wits end...What next? a good Toyota mechanic?

Answer 1

Toyota has a TSB about these 3 code condition. TSB # PG001-05, When I had these 3 code condition I replaced both  VSV valve for the purge and the vent, After testing the problem was with the VSV for the CCV,