P0455 Engine Code on 5th Gen

[Quint]

My 2021 1500 has about 20,500 miles and just threw its first code - the P0455 for Evaporative Emission System Leak Detected (large leak). Since these trucks don't have gas caps, are there any other easy things to check before I have to drag the beast into the dealer?

 

[kapinallinen2]

My 2021 1500 has about 20,500 miles and just threw its first code - the P0455 for Evaporative Emission System Leak Detected (large leak). Since these trucks don't have gas caps, are there any other easy things to check before I have to drag the beast into the dealer?

Visually inspect the capless filler is about all you can do without really digging into it.

 

[Quint]

Thanks.

I visually inspected it when I tossed in some more gas the other day. It all looks good, but I can't say that I looked too hard previously.

 

[WhiteKnight4x4]

I got this code several months ago. Cleared it with a cheap coder reader and it never returned.