Hello all,
I need solutions and instructions on how to repair the code P0174 on my 4WD F150 Super Crew.

I see all sorts of posts about that code but not specifically for the 2004. This gets frustrating because the engines are many times different and no one give instructions on how to repair the problem. Complete instructions would be great. I can do the work, just need someone to give complete instructions or even do a video on that specifically.

V/R
Plazapro

 

P0174 - System Too Lean (Bank 2) This even applies to this day and year model.

Possible Causes:

Ethanol content in the fuel
Fuel filter plugged or dirty
Damaged or worn fuel pump
Leaking fuel pump check valve
Leaking or contaminated fuel injectors
Low fuel pressure or running out of fuel
EVAP purge valve is leaking when the canister is clean
Fuel supply line restricted
Fuel rail pressure (FRP) sensor bias
Exhaust leaks in the exhaust manifold gasket or mating gaskets before or near the heated oxygen sensor (HO2S)
Vacuum hose disconnected on exhaust gas recirculation (EGR) system module (ESM) applications
EGR valve tube or gasket leak
EGR vacuum regulator solenoid leak
Air leaks after the mass airflow (MAF) sensor
Vacuum leaks
Positive crankcase ventilation (PCV) system is leaking or the valve is stuck open
Incorrectly seated engine oil dipstick
Intake air turbulence due to incorrect air filter
Damaged or contaminated MAF sensor