First owner of a 2006 Scion xB auto ( no mods )

I get the same codes pop up
P043E, P043F, P2401, P2402, and P2419

Found a toyota service bulletin for a 2006 Scion xA
with the same codes.
http://tijil.org/Scion_TSBs/eg04706.pdf

These three lights keep coming up on my dash
and the dealership keeps telling me it's the gas cap.
Well I have bought numorus caps, made sure my gas
is low ethonal, cleared the codes and they still come
back. I think this is a defect the company does not
want to fix. I am now out of warranty and I looked
up the part alone are $500.00 not counting the
labor.

I just want what a bought.

Has anyone had similar problem?