P2401 2010 Yaris Hatchback 90K Quick Pass

[cherrmj]

Hello, My Daughter is out of state and is coming home for a visit and to have the car emission tested. Will only be in town for five days and of course CEL this week. Code P2401 She said over the last few months it would come on and off every week or so. We talked about over fuel filling and securing the cap. I've read may posts here and elsewhere and cause could be entire EVAP Canister or components or cap or vacuum or.... water in system.... short notice I can not afford new EVAP, Rockauto $525 and not enough time.

I only have a few days and I'm looking for some basic things to try so it can pass for now and address real fix when out of state. In a bit of a panic and just need a Pass on the test for now. Add some HEET if water in tank or ???

Please help me Pass the test!! Thank you very much!!