Need some help

My son owns a 2005 toyota tacoma with a v6.
It was giving me a code p0456.
I tried replacing gas cap and resetting the code. It will last a day then show back up.
Anyway i did find this so far, this hose not attached in the picture.
Any help appreciated on how to tackle the p0456 code before taking to the dealer.
Thanls

 

P0456 is a small leak, aside from doing a good visual inspection of all EVAP lines, canister, fuel tank, and filler neck for anything that stands out you will likely need to do a smoke test to find it. Do note you have to plug the fresh air line at the canister to do a smoke test, closing the vent valve does not seal the system on this design EVAP system.

The disconnected line on the fuel pressure regulator connects to the back of the air filter housing.

 

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