Your vehicle is either getting too much air or gas. I would buy some MAF cleaner and spray your MAF sensor and see if that takes care of it.
Trouble code P0172 means: System too rich (Bank 1)
Trouble code P0172 means: System Too Rich (Bank 1)
Trouble code P0172 means: System too rich (Bank 1)
Trouble code P0172 means: System too rich (Bank 1)
Bank one fuel system rich.
Trouble code P0172 means: System Too Rich (Bank 1)
P0172 System too Rich (Bank 1)
Trouble code P0172 means:System too rich (Bank 1)
Trouble code P0172 means:System too rich (Bank 1)
Trouble code P0761 means: Shift Solenoid C Performance or Stuck Off Trouble code P0171 means: Fuel System Too Lean (Cylinder Bank 1) Trouble code P0172 means: System Too Rich (Bank 1) Trouble code P0175 means: Fuel System Too Rich (Cylinder Bank 2)
Fuel system running lean.
You have to banks which are the o2 sensors so if it says to rich bank one that means your front o2 sensor is bad In my 2000 Saturn SL1, this code ended up being the catalytic converter. Once changed, the code has not come back.