u/Ok-Produce5600

My high beam fades in and out on my 2007 Chevrolet Aveo LT. These aren't related but here's the error codes anyway:

P0340 (failure in camshaft position sensor circuit)

P0420 (Catalytic Converter efficiency below threshold)

I've checked the alternator and battery (reading ~12.5v when not on, ~14.0v under acceleration and ~13.5v at idle)

I've also checked my high beam bulbs as well as their associated fuses, they are fine.

Any ideas? Edit: the high beam lights aren't on, it's just the indicator as far as I can tell.