i get p0455 here and there, although gas cap is brand new and tight. egr nipples are capped off.

Periphery2 FCA bit 1 (second one from top) lists p0450, p0451, p0452, and p0453 only; i was hoping this bit would disable p0455 too. can anyone confirm?

 

bump

 

yes thats the evap, just disable whatever bit says EVAP and the code you want to disappear.

 

i appreciate, i uploaded it but just waiting to drive it

 

just wondering if this fixed your error code im having the same one after i capped off the egr and put the plate on... i edited the ecu and it did 500 miles this weekend no problem got in it after seeing my gf and the engin light came on for the p0455

thanks for the help

 

I thought this would fix my issue as well. It did not.

My solution ended up being "buy a OEM gas cap, not autozone or other", and I haven't had P0455 in 2 months now. I don't know why, but a non-oem gas cap doesn't seem to work on mitsubishi fuel filler.