Bank 1&2 Lean Code

[sonyes]

Truck starts fine this morning but CEL is on, drive all day no problems, get to work truck sits for about an hour, temp drops from 35 out to 28. Went to start it, it cranked and sputtered, now it just cranks. I'm getting Bank 1 and 2 system too lean p0171, p0174. I know to check the maf, check for vacuum leaks, check the fuel pump, i just replaced the fuel filter.
What do you guys think?

 

[Wicked_Sludge]

is the fuel pump running? whats your pressure at the rail?

sounds like a fuel problem to me....water in fuel perhaps?

 

[smokey]

Did you fill the tank recently? bad gas can throw this code. and cause a no start could be water. try a little starter fluid to see if that allows it to fire. if it does it is fuel related.

 

[MAKG]

Quite a number of things can cause lean codes. Not the least of which is electrical grounding and power. The FIRST thing to do is decide whether the oxygen sensors are correct. Is it REALLY lean?

If you don't narrow this down systematically, you'll spend hundreds of dollars and many hours replacing good parts, and you won't fix the problem.

 

[sonyes]

Fuel pump is not getting power. Got it towed to the dealership, hopefully it will be under warranty.