2000 VW Passat rpm drops cuts off when stops

Please help! have a 2000 VW Passat about 110k miles on it
and my check engine light is on. I had it ran and the codes
that popped up were P0441 Evap control system incorrect
purge flow P0134 H02S (bank 1 sensor 1) circuit no activity
P0154 H02S (bank 2 sensor 1) circuit no activity For a few
months Everytime I would put gas in the car it would have
trouble starting, it would start up the rpm would drop under
5 and cut off the only way it would work is if I revved the
engine and threw it in gear then it would drive fine. Recently
it has been doing this every time I start the car and as soon
as I come to a stop whether it be in traffic or at a stop sign
it cuts off. I'm pretty sure it's an idle issue or a fuel issue
but after reading this thread i don't know and plus I don't
know much about cars and I want to takeit to a mechanic
but I don't want to get overcharged. Do these symptoms
sound familiar? Is it a fuel filter issue, or something to do
with the fuel? Also I live in Las Vegas and it's 115 degrees
outside is that a factor? Please help