08 Pontiac g6

Cylinder misfires, plugged cat converter, sensor issues....many possibilities. Have you have the trouble codes read and explained? That might give you a target to investigate.

I have it showed p2101 throttle sensor, throttle position not learned, along with camshaft b sensor when I re checked it was only throttle postion not learned and camshaft

That would be the place to start. Replacing the TPS is not difficult. Many videos on the internet I suspect.

Jennifer, were you able to resolve this issue? My 2010 is doing the same thing, it spit the serpentine belt and it’s the same issue even after putting a new one on. K