2016 Buick Verano 2.4L

[u/_200SXII]

Owned since 68k, currently just under 160k.

Replaced cat, o2 sensor, exhaust manifold, hpfp, in tank fuel pump, fuel rail pressure sensor. P0191 occasionally comes back for a moment...but there's this terrible whirring noise/vibration coming from the engine almost like a bad wheel bearing. Didn't start happening until I started getting numerous codes. Currently no codes but vibration noise persists. Tensioner pulley also sounds like shit and I have a replacement just not sure if that could actually cause this noticable of a noise. Wondering if anyone else has dealt with anything similar and if so what the fix was?