Q: Is there such a thing as a charcoal canister? How much would it cost to place. on 1999 Toyota Solara

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computer scan shows trouble code po440 evap system leak detected
(1) Answer
yes, there is. common failure on toyotas. runs around 350-400.

before replacing this, get a real diag. it could be many things but needs to be checked by a shop with a smoke machine, scan tool and voltmeter.