Large emission vapor leak.
Check the gas cap and all lines from the tank to the engine.
Code P0455 means "Evaporative Emission System Leak Detected (gross leak/no flow)"
Leak in EVAP system detected
EVAP Emission Control System Leak (Large)
The P0455 is an EVAP large leak detected, what the cause is though is hard to say could just be a gas cap or something more
It's a dodge, sell it fast&be thankful
Cylinder #7 Misfire
It's transmission related.
Trouble code P0344 means:Camshaft position circuit intermittent
Trouble code P0455 means: EVAP System Gross Leak (0.080") Detected
Dodge Durango was created in 1998.
Deep Molton Red
Light Pewter Metallic