Trouble code P0174 means: Fuel System Too Lean (Cylinder Bank 2)
Trouble code P0171 means: Fuel System Too Lean (Cylinder Bank 1) Trouble code P0174 means: Fuel System Too Lean (Cylinder Bank 2)
Trouble code P0174 means: System too lean (Bank 2)
Trouble code P0174 means: System too lean (Bank 2)
Trouble code P0174 means:System too lean (Bank 2)
Trouble code P0174 means: System too lean (Bank 2)
Trouble code P0171 means:System too lean (Bank 1)
Trouble code P0171 means:System too lean (Bank 1)
P0174 - SYSTEM TOO LEAN ( Bank 2 - drivers side of engine )
Trouble code P0174 means: Fuel System Too Lean (Cylinder Bank 2)
You probably have a vacuum leak. Check under the hood for a disconnected vacuum hose.
That code is manufacturer specific...I would need to know the vehicle information. 2002 ford windstar v6 3.8l
I was looking at the 2002 Ford Windstar Owner Guide and it shows : ( 5W-20 is recommended )