Check engine light on my Expedition.

[Big Nate]

Ok everyone here it is. I have a check engine light in my Expedition and the code reads “lean bank 1â€￾. This is the same check engine light that I got rid of by replacing two o2 sensors both before the cat. Then after maybe 50 miles the light came back on with the same error. What do you guys think the issue could be? I am open for anything I just want the dam light off.

And if there is anyone how does know and would like to come HELP me do the work I would be fine with that.

 

[JustROLLIN]

I will diagnose your truck if you wax my car?

 

[JustROLLIN]

Oh and btw, it could be a vacuum lean, could be a low fuel press issue, or a multitude of other things.

 

[aviateur]

Here's a couple of other ideas. This is for the 3, but the systems work similarly, i'd guess.

http://www.mazda3forums.com/index.php?topic=75658.msg1361645#msg1361645

 

[mndsm]

Bad fuel rail? Generally when one side goes on an engine like that, it's some sort of delivery issue.... clogged line, bad filter, something. Have you run engine cleaner through it?

 

[Big Nate]

Yes with the engine cleaner and no with the filter. That thing is a bitch to get off there is a tool you use to remove it but I think ford made it different then other fuel line tools. It may be a leak in the plenum but don't know .

maybe LSE guys could through in there info and see if they can help.

 

[mndsm]

Possible. Have you seen any pinholes in fuel lines?