HELP!!! P0171 and P0174

[chetshores]

I have a 2003 BMW 325Ci. My SES light is on and I pulled the codes at i got P0171 and P0174 which says the car is running too lean bank 1 and 2.

The boot is not cracked or leaking.
I checked for any vacuum leaks with carb cleaner.
I cleaned the MAF.
I checked the fuel filter.
I dont think it would be the O2 sensors because its unlikely for them both to go out, but with my luck anythings possible.

Before i fork out the $300.00 for a new MAF anybody else got any suggestions?

PCV?

[chetshores]

Ccv?

[Jack Dabsy]

DON'T change the MAF !
Does it idle roughly or even misfire occasionally?

[westin]

ccv?what does it do if you don`t mind me ask, is there a pending code , can you check your maf with a scope pattern through your scan tool. you can check you other main sensor the same way to avoid any part swapping with no leads

[chetshores]

it does not idle rough or ever misfire. and i really dont want to change the MAF.....

[Jack Dabsy]

Could be fuel pressure or tired injector(s)...
If the O2 sensors failed, I think it would run rich !!