4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

Throwing codes P0171, P0174 Sys too lean 1,2 how do I fix this?

Old 08-18-2008, 12:32 AM
  #11  
llamatymer
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Thanks for the help guys it looks like I have a couple of busy days ahead of me. Maybe i'l do it while the hurricane hits my house it should be exciting. I'l post what fixed it when I find out what it is, and I just replaced my fuel filter. It could be an exhaust leak because I took a speed bump pretty hard the other day freaking huge speed bump.

Thanks all,

-Matt
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