P0455 code
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I have a 2003 Dak. w/4.7L. I had this problem also and it wound up being a hose end that came off of the vapor canister that is mounted about middle ways of the cab on the drivers side of the truck. You can buy the hose ends at the dealer for about $13.00 if you are lucky enough to not have to buy the whole harness. Good luck with it. I hope this helps.
#7
Evap leak fixed
I solved two CEL codes: P0455 & P0456. "Large & Small Evap system leaks.
The 1/4 & 5/16 hoses on the drivers side under the hood between the
battery and engine were split at their fittings.
look for a schrader valve with a green cap. the 5/16" hoses connected to this
were split.
The 1/4" hose off the left side of the intake manifold also cracked.
This took about an hour and $10 worth of fuel hose. The worst part is
the old tape holding the hoses. Have the hand cleaner ready.
Hope this helps, GH
The 1/4 & 5/16 hoses on the drivers side under the hood between the
battery and engine were split at their fittings.
look for a schrader valve with a green cap. the 5/16" hoses connected to this
were split.
The 1/4" hose off the left side of the intake manifold also cracked.
This took about an hour and $10 worth of fuel hose. The worst part is
the old tape holding the hoses. Have the hand cleaner ready.
Hope this helps, GH