Alright I have a 2003 5.7L its throwing the following codes.
# P0440 Evaporative Emission Control System Malfunction
# P0441 Evaporative Emission Control System Incorrect Purge Flow

can somebody tell me in english what the heck this means and how I go about fixing the problem. My MPG are way down and its killing me.

Thanks for the help......

 

Somebody's got to know something come on guys

 

Mine threw the same codes.
Replaced the egr valve and all seem well...
So the dealership says anyways. I never noticed a lack of mpgs tho.

Hopefully that helps some?

 

before DF- google was a very close friend of mine.

http://www.obd-codes.com/p0440

http://www.obd-codes.com/p0441



neither say anything about MPG decreasing though.