p0174 Jeep System Too Lean (Bank 2)

First thing I would do is look at the injectors and oxygen sensors, or at least the bank2 sensor.
Thats what its pointing at right now.

 

it could be a few things.
clogged fuel filter.. cheapest and easiest thing to fix.plus if you havnt replaced it recently might be a good idea...
your map not maf could be messed up.. but they usually run rich when these go bad.. but dont rule it out
it could also be the o2 sensor is messed up
the 3 usual culprits are listed hope it points you in the right direction

 

system lean 2/1 abnormal rich adjustment indicated

 

Jeep 4.0 only has one bank

 

Man that engine is CLEAN!! Love it!

 

bank 1 pre cat
bank 2 post cat

 

ya actually no chrysler has a maf, and p0174 i think is bank 2 lean and by the look of your intake and the heat shield around the injectors yours is a 00-01 so you back three cylinders are lean and i would say to replace th 2/1 o2 sensor but i cant guarantee anything

 

The term bank normally refers to cylinder heads.(ex....bank 1, left side head... bank 2, right cylinder head)

Inline engines only have 1 bank, so the correct labeling would be bank 1/sensor 1 for pre-cat and bank 1 sensor 2 for post cat.

It's just incorrect wording in the code

 

actually 00-01 xjs have 2 banks first 3 cyl are 1 and second 3 are 2

 

That's still only 1 cylinder bank

 

ya its 1 head but in the pcm it is listed as 2 banks thats why they switched to the 2 precats

 

That's fine if you want to label like that. But the person I originally corrected said that bank 2 is a downstream O2 sensor

 

ok i c ya they only have bank 1 downstream its a pretty screwed up system on the 00-01s just because they kept trying to get it to pass emissions, o and then to make things clear to the guy fixing the problem 2/1 is the sensor right below the cat closest to the firewall

 

my bad lol

 

Ok so I need to replace the 2/1 sensor... right