Calling all 5.4l experts *P1131* error
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Junior User
Joined: Oct 2004
Posts: 71
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Calling all 5.4l experts *P1131* error
OK, here's my problem...
1997 Expedition 5.4l 4x4.
P1131 error
My Expedition shutters at idle and just plan doenst run that well. I've already replaced the common pcv valve and hose assembly and that didnt fix anything. One thing I noticed is my rear a/c doesnt work properly. What I mean it the air flow doesnt change fully when swiched to panel or floor. My understanding is this could be caused by a vaccum leak. I also been told the P1131 error is generally a vaccum leak. Where I need the help is does anyone know where a common vaccum leak is or where mine might be. I've looked everywhere under the hood but I cant find anything, but then again I dont know if I'm even checking in the right area.
Any help or suggestions would be greatly apreciated...
1997 Expedition 5.4l 4x4.
P1131 error
My Expedition shutters at idle and just plan doenst run that well. I've already replaced the common pcv valve and hose assembly and that didnt fix anything. One thing I noticed is my rear a/c doesnt work properly. What I mean it the air flow doesnt change fully when swiched to panel or floor. My understanding is this could be caused by a vaccum leak. I also been told the P1131 error is generally a vaccum leak. Where I need the help is does anyone know where a common vaccum leak is or where mine might be. I've looked everywhere under the hood but I cant find anything, but then again I dont know if I'm even checking in the right area.
Any help or suggestions would be greatly apreciated...
Senior User
Joined: Oct 2004
Posts: 418
Likes: 0
From: Richmond, TX
P1131 - Lack Of HO2S11 Switch - Sensor Indicates Lean
Not sure what this switch is that the code speaks of. Maybe others can help, or you can run a search here or on the 97+ F-150 area and get a better idea what to do.
Not sure what this switch is that the code speaks of. Maybe others can help, or you can run a search here or on the 97+ F-150 area and get a better idea what to do.
