2011 GMC Terrain SLT (dont have current mileage), automatic 2 wheel drive. Ive been getting these codes, the P0017 is new within the past week. Ive looked at the _p0172/175 issues and bought a new fuel pressure regulator (ended up being the wrong part) but after taking it out it looked pretty good. i have not check fuel pressure with a real tool, i use TORQUE and it looks pretty normal. Really cant afford to get a parts or get a mechanic. i rather do it myself, ive been through tons of youtube vids and i get a few posibilities of the issues. What are your thoughts to what it can be
P0172: System too Rich (Bank 1)
P0175: System too Rich (Bank 2)
P0017: this was a new code, looks to be a cam sensor issue
Wow! And both banks are running too! Rich, if you have high mileage you could easily be. The fuel injectors are worn and dripping too much fuel but of course it could be bad math sensor. Computer failure could be all kinds of things. But I would first make really sure that the fuel pressure regulator is the correct one and isn't leaking because that's the number one cause on those things
