P1457, P0441 codes

[LCollins]

So, I've got a 2012 RAM 1500 Longhorn with a 5.7, and I'm dealing with a P1457 and P0441 codes. I've replaced the fuel tank pressure sensor, the gas cap, and the fuel vapor leak detector and I cleaned the ground where they're terminated to the frame but the problem persists. The strangest part is that on warm weather days the codes disappear, but return on cold mornings. Any thoughts? I had the engine replaced 18 months ago, and I keep wondering if a wiring harness that was disconnected during the engine swap might be loose.

 

[GTyankee]

https://www.engine-codes.com/p1457_dodge.html

https://www.engine-codes.com/p0441.html

your trucks Purge Valve, is either almost under your Battery
or
right next to your throttle body

remove it & try to blow through it, if you can, you need to replace it

if it is under the battery, make sure that it is installed right side up