Code P0174

2001 FORD EXPEDITION
117,250 MILES
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BCMULLEN95
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  • 249 POSTS
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.
Nov 13, 2011 at 5:36 PM
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FIXITMR
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possibly oxygen sensor bank 2?
Nov 13, 2011 at 5:55 PM
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FIXITMR
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but most common cause is vacuum leak from hose or fitting.
Nov 13, 2011 at 6:00 PM
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BCMULLEN95
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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?
Nov 13, 2011 at 6:12 PM
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FIXITMR
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smokers can blow smoke around parts and see if it gets sucked in.
Nov 13, 2011 at 10:46 PM
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BCMULLEN95
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  • 249 POSTS
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.
Nov 14, 2011 at 12:48 PM
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RIVERMIKERAT
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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.
Dec 9, 2011 at 7:48 PM
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