CODE P0174

  • Tiny
  • bcmullen95
  • 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.

Monday, November 14th, 2011 AT 1:36 AM

6 Answers

  • Tiny
  • fixitmr
  • Member

Possibly oxygen sensor bank 2?

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Monday, November 14th, 2011 AT 1:55 AM
  • Tiny
  • fixitmr
  • Member

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

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Monday, November 14th, 2011 AT 2:00 AM
  • Tiny
  • bcmullen95
  • Member

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?

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Monday, November 14th, 2011 AT 2:12 AM
  • Tiny
  • fixitmr
  • Member

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

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Monday, November 14th, 2011 AT 6:46 AM
  • Tiny
  • bcmullen95
  • Member

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.

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Monday, November 14th, 2011 AT 8:48 PM
  • Tiny
  • rivermikerat
  • Expert
  • 6,155 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.

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Saturday, December 10th, 2011 AT 3:48 AM

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