Mechanics

CODE P0174

2001 Ford Expedition • 117,250 miles

I have this code that keeps coming on, I have replace fuel filter, spark plugs, cleaned MAF with electrical cleaner, replace air cleaner. I do know that the code represent there is to much air per fuel ratio on bank 2 side. I checked for leak on intake using carb cleaner. Is there anything else that maybe causing this code to come on? There is a slight performance issue.
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Bcmullen95
November 14, 2011.




Possibly oxygen sensor bank 2?

Tiny
Fixitmr
Nov 14, 2011.
But most common cause is vacuum leak from hose or fitting.

Tiny
Fixitmr
Nov 14, 2011.
I am not thinking O2 as when scan tool is connected they are working with in specs. Tomorrow I will be searching for a leak in a hose. Is there a really good trick into finding a leak other that spraying carb cleaner?

Tiny
Bcmullen95
Nov 14, 2011.
Smokers can blow smoke around parts and see if it gets sucked in.

Tiny
Fixitmr
Nov 14, 2011.
I have a question in regards to finding out if the MAF is the actual problem. I was using my scan tool and the reading for MAF are 8.0 to about 8.13 gm/s. Is this a normal range for the MAF.
AD

Tiny
Bcmullen95
Nov 14, 2011.
Check the MAF voltage when the engine is hot and idling. It should be between.6 and.9 volts. Zero volts key on, engine off.

Rivermikerat
Dec 10, 2011.

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