I have a 2002 Dodge Durango SXT. The P0441 code keeps popping up. The Evap purge valve been changed twice. Gas cap been replaced. For six months i was good and now the nightmares are back. Please Help Me.

 

You will need to perform a smoke test to pinpoint the leak.

 

Concentrate on these two things.... emission hoses and leak detection pump.

I had that code intermittently for years. It would come and go, but I was always able to find a window in which to get the emissions done.

I got tired of the light every few months though, so I started looking at all the hoses running from under the battery tray and found a cracked hose there and on a hose that ran to the PCV valve (if I recall correctly). I never would have known the hose was split if I didn't squeeze it, so squeeze and observe as you go along. It's usually the ends that crack. I cut the split ends off with a knife and reattached with zip ties. Also looked under the truck at the hoses running to charcoal canister and those seemed okay. Well the problem lessened in frequency, but didn't entirely go away. The final fix was to replace the NVLD pump (leak detection pump), which is located underneath the truck, roughly below the drivers seat in my quad cab.




The pump was one I got from a wrecked 2009 Chrysler PT cruiser. The pump is WIDELY used across many models and years of Chrysler vehicles, so I found the latest model vehicle that had one in the junkyard and it worked. Cost me only a few bucks and not a peep out if it since. If you search on the pump in ebay, it will show you the models that it fits. There are many aftermarkets (cheap too) but I stick to OEM with these things.

 

I'm sorry the smoke test was done by a mainstream auto shop. The hose lines replaced filters also replaced. Wondering still if i should have taken ol' gurl the dealership?

 

Smoke tests were done on mine too, yet I was able to find split hoses. Manually go through all the hoses as I described. You can spend your coin at the dealership too, but they don't seem to find permanent fixes for it...conveniently for them. And don't forget the NVLD pump can go bad.

 

I have never tried a smoke test but I honestly don't believe it would work with very small leaks. Even if the smoke does make it's way out the tiny hole it could be so little you may not notice it. It would also depend how much smoke/pressure is induced.
I second Dodgevity's idea of going through all the hoses with your own eyes, fingers, and brain.

You two OP's should monitor each others threads for double the help 😎
https://dodgeforum.com/forum/2nd-gen-dakota-tech/430366-several-codes-on-my-03-v8-dakota.html


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Thank you for the advice.