Code P0174

2001 FORD EXPEDITION

117,250 MILES

BCMULLEN95

MEMBER
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 14, 2011 at 1:36 AM

FIXITMR

✓ASE Certified Mechanic
9,990 POSTS

possibly oxygen sensor bank 2?

Nov 14, 2011 at 1:55 AM

FIXITMR

✓ASE Certified Mechanic
9,990 POSTS

but most common cause is vacuum leak from hose or fitting.

Nov 14, 2011 at 2:00 AM

BCMULLEN95

MEMBER
249 POSTS

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 14, 2011 at 2:12 AM

FIXITMR

✓ASE Certified Mechanic
9,990 POSTS

smokers can blow smoke around parts and see if it gets sucked in.

Nov 14, 2011 at 6:46 AM

BCMULLEN95

MEMBER
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 8:48 PM

RIVERMIKERAT

✓ASE Certified Mechanic
6,110 POSTS

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 10, 2011 at 3:48 AM

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