P0171 Code
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5th Wheeling
Joined: Jul 2024
Posts: 34
Likes: 1
P0171 Code
My trucks check engine light popped up and I scanned the system and it was showing P0171 code, I’ve replaced the PCV valve and two leaking vacuum hoses. I’m not sure what else it could be? And I check the Mass airflow sensor and it looks clean along with my air filter.
Hotshot
Joined: Jul 2005
Posts: 11,931
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if it is a V6, the intake manifold gaskets are questionable.. If it is the 5.4 V8, keep looking at the vacuum hoses.. two small 1/4 inch hoses about 8 inches long by the drivers side exhauses manifold get hot / crack / leak.... take each hose off ( all of them) one at a time and check for hard / crack / leaks and replace as needed.
Fleet Mechanic
Joined: Jun 2023
Posts: 1,379
Likes: 383
From: WA
Fleet Mechanic
Joined: Jun 2023
Posts: 1,379
Likes: 383
From: WA
@waldo16
Put your details here and people will know. Don't forget to scroll down and "Save...".
https://www.ford-trucks.com/forums/p...=editsignature
Put your details here and people will know. Don't forget to scroll down and "Save...".
https://www.ford-trucks.com/forums/p...=editsignature
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