Hello guys i hope you guys can help me out with my problem

i have a 05 Sonata 4 cylinders, the check engine light came out and it gave me a P0016 which is the camshaft position sensor which i replaced a few months ago and everything was working fine until the light came up again with the same code i replaced the sensor again (under warranty) the light went off but it keeps coming up after a little bit of driving so PLEASE NEED HELP !!!!!!!

any ideas will help