Lean Bank#2 on a 5.4 NEED HELP - F150online Forums

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Lean Bank#2 on a 5.4 NEED HELP

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Old 02-15-2010, 11:42 PM
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Lean Bank#2 on a 5.4 NEED HELP

MY check engine light came on a while ago, so i pulled the code with my buddies reader, i think the code was PO 174, it was lean bank 2. does anybody know what this means? the truck still runs ok. doesnt feel 100% though. any help would be awesome.
thanks
oh by the way its a 2004 5.4

Last edited by NawwMann772; 02-15-2010 at 11:45 PM.
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Old 02-16-2010, 02:37 AM
glc glc is offline
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Check for vacuum leaks and a clogged fuel filter.
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Old 02-16-2010, 03:30 AM
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Post your mods as well.
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Old 02-16-2010, 06:07 PM
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air filter, clean or replace
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Old 02-18-2010, 06:38 PM
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the truck/engine is bone stock, i already changed the airfiler. but i havent replaced or checked the fuel filter. i will do that this weekend at sometime hopefully. thanks to help
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Old 02-27-2010, 06:24 PM
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if the 5.4 in your 2004 is the same as my 1999 5.4 its the o2 sencer . It's not that hard to replace it's just a 50 dollar part i change bank 1 sencer 2 on mine and it took about 5 mins
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Old 02-27-2010, 09:10 PM
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Thumbs up Code Bank

Here is a great link to help you investigate your code:

http://www.motorcraftservice.com/vdi...&vehCode=C_VIC

Once you are on the site enter your vehicle info and it will give you a fairly detailed list of information regarding any code.
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Old 02-27-2010, 09:27 PM
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Quote:
Originally Posted by BigTrouble View Post
if the 5.4 in your 2004 is the same as my 1999 5.4 its the o2 sencer . It's not that hard to replace it's just a 50 dollar part i change bank 1 sencer 2 on mine and it took about 5 mins
Thats wrong. The o2 IS working its reporting a lean condition. He has a vacuum leak or a low fuel pressure issue replacing the o2 with this code would be a waste of money unless its got a lot of miles on it in witch case they should be changed anyway (both fronts.)
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Old 02-28-2010, 11:37 AM
glc glc is offline
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Sensor 2 is the downstream sensor, and it does not affect the way it runs at ALL - all it does is report on catalyst efficiency for emissions monitoring. You just shotgunned 50 bucks at nothing.
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Old 03-03-2010, 12:09 PM
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Ok, ill check into that vacuum leak. and prob going to change that fuel filter cause its only 10$ anyway. i appreciate all the help guys. thanks
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