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

 

Check for vacuum leaks and a clogged fuel filter.

 

Post your mods as well.

 

air filter, clean or replace

 

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

 

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

 

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.

 

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.)

 

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.

 

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