I was told by a ga mechanic that i need to purchase a "vapor emissions canister" for my 2005 scion tc in the amount of $520.96 (parts & labor) i see there is a recall/technical safety bulletin on this below bulletin no: s-sb-0030-09 date of bulletin: 08/30/2010 summary description: scion: some tc vehicles may exhibit a mil on condition with one or more of the following dtcs: p0455, p0441 or p0456. *pe 2005 toyota scion tc fuel system, gasoline service bulletin 288332 nhtsa: action number: 10033635 service bulletin number: 288332 report date: jun 02, 2009component: fuel system, gasoline summary: scion: some tc vehicles may exhibit a mil on condition with one or more of the following dtcs: p0455, p0441 or p0456. *pe do i really need to purchase this or can this be corrected by scion/toyota? *tr