Check Engine Light - Lean Bank Two?? What?
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Joined: May 2007
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Check Engine Light - Lean Bank Two?? What?
My check engine light has come on a couple of times lately. I have simply taken the truck to Auto Zone and used the plug in decoder to find out what is wrong and clear the code. Since it is running fine and the mileage hasn't changed, I didn't feel the need to rush it to a shop. I am getting a "lean on bank two" reading. This morning the CEL came on again. My first thought is that it must be the O2 sensor? Has anyone had this same issue. The engine is the 5.4L, the truck is an 05 model f250. I don't want to bring it the ford dealer to get ripped off.
Thanks
Thanks
Mountain Pass
Joined: Oct 2004
Posts: 186
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From: New Mexico
Check for a vacuum leak. My '98 F-150 and 97 Expedition, both 5.4l did the same thing. Follow the PCV line around the back side of the intake manifold. The line tends to split where it makes a sharp corner there.
FTE Leadership Emeritus
Joined: Sep 2000
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From: Stephensville WI
Check all of your vacuum hoses for leaks, cracks or just plain "came off".
Also, depending in your mileage, certain parts on your truck may still be covered under the federally mandated emissions control devices warranty.
Also, depending in your mileage, certain parts on your truck may still be covered under the federally mandated emissions control devices warranty.
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thanks - I will try that today - I checked all over for disconnected hoses or damaged hoses and couldn't find anything -
will let you guys know what the problem was
will let you guys know what the problem was
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Senior User
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If your using a K&N oil type filters you will get that 0171 code a lot. The oil dirties up the little wire.
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Thanks for the heads up, I do have a K&N filter in there. I haven't checked the MAFS yet. Pretty much being lazy and because it has been cold up here in Denver. I plan to shortly, and will definetly post what I found,t
thanks again
Jason
thanks again
Jason
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Joined: Dec 2001
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Your situation is exactly what I experienced with my 2002 5.4
An experinced Ford mechanic on this website suggested gently cleaning the MAF with electronics cleaner as a first step ...... and that solved the problem.
Hope your problem is that easily solved.
An experinced Ford mechanic on this website suggested gently cleaning the MAF with electronics cleaner as a first step ...... and that solved the problem.
Hope your problem is that easily solved.
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