P0174 System too lean (Bank 2)???

[CoachR]

CEL came on so I went to autozone and got this reading P014 System too lean (Bank 2), however truck seems to run just fine. I have an 03 Sport trac 4x4, 4.0 SOHC v6. My neighbor and another buddy say to change the O2 sensor. ONly thing is will this fix it. ALso, I see 3 O2 sensors is that how mnay there are on this vehicle, or am I just not seeing on. My truck starts kind of slow and during the winter sometimes would die right after I started it. During the summer it has just been a little slow starting. I have 94K on it so figured I would change the spark plugs. SO my question is will changing the O2 sensor fix the problem, and which sensor do I need to change for Bank 2??

 

[BrooklynBay]

Welcome to this forum! It could related to the spark plugs, a vacuum leak, or leaking intake manifold gaskets.

 

[CDW6212R]

Ditto, plus mine was the fuel pressure, check that also(62psi). Welcome,

 

[briwayjones]

If you've never changed the plugs and wires do that first. They can cause it. If it doesn't help it's probably still more likely that's it's some kind of vacuum leak than a bad O2 sensor.

Welcome to the forum.