Check Engine Light P0455, P0441, P0456

[RedStickHam]

This morning when I started up my Yaris, the Check Engine Light was on. When I got home, I pulled out my OBD2 reader and got these codes in this order.

P0455
P0441
P0441
P0455
P0456

One thing I did do was remove the gas cap and put it back on before driving home, but the light stayed on. Some of my research has already indicated it could be the gas cap, but there are other things it could be because these codes are related to Evaporative Emissions Leaks.

In December at my last inspection, when the gas cap was pressure tested, it failed, even though the check engine light was off then. They sold me a new gas cap for $10 and renewed my inspection for another year.

The car isn't running any different than it normally does, no strange noises, hesitation or anything like that. The car is a 2009 Yaris Hatchback 5spd with 34,000 miles on it.

Anyone else had this problem?

RedStickHam