haolepinoy
Incomplete Idiot
I'm having this same code on my 2006. It will trip the CEL if it's logged as pending and it is detected again. It happened to me the other day, was pending, I started the truck to warm it up and when I got in to drive off, the CEL was on. I need to get this one figured out too.
Phil from JDM Journeys and PajEvo #581 fame recommends over at the ADD forum checking the fuel filler neck if you're getting a P0456 code. It looks like both Jason and AJM are in Pennsylvania, aka the rust belt, so it very well could be possible that you've got some corrosion-related pin holes in the filler neck. Andrew and Brad from Auto Off Topic have talked about this common rust belt issue a number of times as the first thing they suspect after the fuel cap when it comes to checking for evap leaks.
Last edited: