My G recently through codes
P0175 fuel system too rich (cylinder bank 2)
P0172 fuel injection system too rich

Would anyone know why these codes are happening or where exactly the problem is?
MAF, Cats, fuel injectors, O2 sensors, spark plugs ???

 

Hmmmmm

http://lmgtfy.com/?q=infinity+code+P0175+and+P0172

 

That shows both banks, so I'd start with the basics and look for things that affect the engine as a whole.

Air restrictions
Spark plugs
MAF sensor
Fuel pressure

I highly doubt it's the CATS or both A/F sensors at once.

 

Alright thanks.

Do you know how to test fuel pressure