OBDii Code p0171 p0174 on 1999 BMW 540i

I try to slove this problem i spend lot of mony on it sttil
code coming up for p0171&p0174 thanks

Asked by for the 1999 BMW 540i
Check out this article about the OBD II Code P0171 and P0174: Fuel System Too Lean (Bank 1 or 2).