you have a small evaporative system leak.First ,replace the gas cap,if this does't clear your MIL, then comes the hard part.yo have tocheck every emission hose from the gas tank filler tube to the canister.These are sometimes very small air leaks, coming from worn hoses,brittle and fragile.Before you do any of thi s you must first jack up the car ,Slide under it.you'll even have to check the canister it's self ,and the Purge vale solenoid.If you can detectnothing(no Air coming from any of the hoses), And you still light up after you replace vthe Gas Cap,Take your Neon to a shop so thatey can pressurize theSystem with smoke where the smoke exits, marks theleak, problem solved!
Trouble code P0440 means: EVAP Purge System Fault Trouble code P0441 means: EVAP Purge Flow Monitor Fault
evap system
Trouble code P0440 means: EVAP Purge System Fault
Trouble code P0441 means:Evaporative emission control system incorrect purge flow
Trouble code P0441 means:Evaporative emission control system incorrect purge flow
Trouble code P0441 means:Evaporative emission control system incorrect purge flow
Trouble code P0440 means: EVAP Purge System Fault
Trouble code P0441 means: EVAP Purge Flow Monitor Fault
Trouble code P0441 means: EVAP Purge Flow Monitor Fault
Trouble code P0441 means: EVAP Purge Flow Monitor Fault
Trouble code P0441 means: EVAP Purge Flow Monitor Fault
Trouble code P0440 means:Evaporative emission control system malfunction