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code p1131 & p1151 check engine question

posmindset

Active Member
Joined
May 26, 2009
Messages
98
Reaction score
0
Year, Model & Trim Level
02, Explorer 4.6L 4x4
i got both of these codes for 2 days in severe cold teens temp and the check engine light came on.

today it's 50 degrees and the check engine light is no longer on in my 2002 4.6ltr eddie bauer 4x4


should i start by replacing the mass air flow sensor?
 




jk7294

Member
Joined
January 7, 2011
Messages
33
Reaction score
3
Location
Indianapolis
City, State
Indiana
Year, Model & Trim Level
2002 Limited V8
Mine had that same issue once and it turned out just to be that some water had got into the plug wells from condensation, it caused a misfire that went away when the temperature warmed up and the water dried out. Had it happen another time where the valve cover leaked and got oil in the plug wells and had to replace the valve cover gasket. I just replaced all the plug boots and cleaned the plugs while I was in it both times, cleared the computer and it never happened again.
 








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