Need help Fast!!!!!!! 2006 Aveo Hatch/SV (Emmisions Issues)

[JamesJames]

Good Afternoon,
I presently own a 2006 Chevy Aveo / Hatchback SV.
My emissions test came up and it wont pass.
Due to work and other busy schedules I kinda let this go till the last minute. And I mean the last minute!
Originally had 9 trouble codes. One for Plugs and wires. Cleared another with a Gas cap, Fixed a leak in Hose running from Throttle body to air-but not completely sure so im still questioning if this small leak brings up these last two remaining trouble codes.
Now I Got it down to two codes.
Two remaining codes P0455 and P0498 and I'm having trouble pinning these two down, Dont even know where to start.
I would like to try and fix these last two myself as Quickly as possible, but if I cant then I'm taking it in.
MY REAL PROBLEM IS THIS............
I need to have this pass by August 17 or I will have a bigger issue on my hands, if you know what I mean.
Any help would be extremely appreciated.
Thank You for any help,
James.......

[ontarian_frog]

P0498: Looks like the vent solenoid for the evap system might need to be replaced or has a broken wire/bad ground, hence low voltage condition.

P0455 might be caused by P0498. Will check manual tonight to see if it points in other directions.