1999 Ford F-150 Q&A

1999 Ford F-150 Question: check engine light on

code p171 bank 1 too lean. what should i do to fix it? -
Answer 1
The 2 things i would do first is have someone check for vacuum leaks with a smoke machine. And also have the MAP sensor cleaned. Reset the engine light and test drive it. Sometime a collapsed vacuum hose will not show up with a smoke machine because the smoke pushes pressure in the hose. Have someone check all hose with a good bright flash or drop light. -
Related Items:
I had a coil go out I couldn't tell which one until my check engine light came on than I put scanner on it then it told me what cyciner it was how can u tell before the check engine light come on t...
My truck, the f150 is giving me problems. Last thursday it wouldn't turn on. So i got someone to jump start it. It worked. So when i got home that day I switch the ford expedition battery to t...
just got my first truck, it has a 300 straight 6 in it, have done changed the starter,valve cover gasket,fuel filter,fan clutch,oil & filter,now the check engine light is on, dont know the diagnost...
My engine light came on and I took the truck to the garage,and they put an oxygen sensor in.The light went off and came back on, about one hour later.It has done this 3 times now.An oxygen sensor w...