Any idea on this Code combo?

[ghs215]

Hi All,

My 4Runner threw these codes all at once. Any ideas? Related?


P0456
Evaporate Emission System Leak Detected (very small leak)

C1201
1.Brake Boost Sensor Circuit Range/Performance
2.Engine Control System

I'm reading this and hope it is just a gas cap issue, but nothing is *that* easy...
http://www.toyota-4runner.org/4th-gen-t4rs/151487-check-engine-trac-vsc-read-me.html