Evap system problem (P0411, P0422, P0466) VSV help.

2004 Tacoma double cab V6 74,000 miles

Got a check engine light and codes are P0411, P0442, and P0446. I'm thinking that one of the vacuum switching valves has gone bad. I've heard that there are a total of three VSV's in the system and I'm wondering short of removing all of them for a bench test, is there anyway I can know which one is bad?

There is no "hiss" when removing the gas cap. Truck seems to run fine and there is no apparent issue other than the codes.

Also wondering if you guys can help me on the locations of the VSV's. I think there is one on the actual charcoal canister and one under the hood. Can the one on the canister be removed without pulling the bed or gas tank?

Any help is appreciated. There are service manuals from ncttora linked in older threads, but the links are all now dead.

Thanks for reading.

 

Same codes on my truck last week. Hoping it was a gas cap not tight. I'll keep an eye here would love to see the locations of the vsv

 

https://www.tacomaworld.com/threads/help-check-engine.474361/