P0441 p0455 and not gas cap

[Frontline]

2009 gx with 166k miles with a brand new gas cap. Trying to track down source of daily codes. I have search but have not found anything for the 4.7 i am not mechanically inclined but have a person i know if i point them in the right direction can fix stuff. An thoughts on where to look? Also occasionally getting weird rattle/ grinding noise. Someone on a different forum for lexus isf point to a evap pump failing but i dont see that listed as a part of the 4.7. Any input qiuld be helpful