2006 Dodge charger 2.7L

Ok so I have a 2006 Dodge charger with a 2.7L
engine. The car only has about 140,000miles on it.
I drove the car every day since I bout it without any
problems for about 7 months or 25,000 miles. All
of a sudden I was driving around one day stopped
at the store came back and my engine light was on
along with the power light. When I went to pull out
was like I had no power in the motor. It wouldn't go
over 2500 rpm and would hardly pick up speed but
xoucould get it up to 50 mph. So I checked the
codes and got ones for a misfire in cylinder 1,
something for the o2 sensor, #1, camshaft
position sensor code, and a code for either
something to do with coolant or temperature.
       Now I've tried everything from putting dry gas
in it to changing all 4 of the o2 sensors, I've
replaced coil packs and spark plugs, coolant
temperature sensor, camshaft position sensor,
throttle position sensor and still does the same
thing.
   Now the odd thing is if it's cold it starts right up
and drives normal but as soon as as the engine
warms up the power light comes on the dash and
it starts acting up again. I'll lose acceleration, like I
can floor it but it won't rev over 2500 RPM and then
when I'm idle the engine starts to chug and just
runs like crap. Eventually it will stall out and then in
order to start it u have to either crank it for 15-
30sec or crank it and floor it to get it to even start
and it stays running like crap until I shit it off and
let it sit long enough to let the engine temp go
down to nothing.
Ive brought it to a mechanic and it has us
completely stumped and have no idea what to do
or even try next.
If anyone has any ideas I would greatly appreciate
the help. Thank you