Its the black box behind the driver side rear wheel. Its an easy fix. But before you go and buy new parts, the hoses are notorious for cracking and/or breaking. SO, jack up the rear, look around that black box and check all the hoses. There is also a little elbow like valve stuck in the front of the box. Thats the evap. valve. Take it out, shake it around, put it back in. Check all the hoses and clear the codes.
To clear the codes-->
My SpecV / ECU code listing and how to (SES light)