P0455 Evap Emiss large leak

[BBthomasbb]

check gas cap message then this...changed cap and purge valve 2 times and it came back on! What's next?

 

[Fivefingerdeathpunch]

Smoke test the entire system, easiest way to figure out where the leak is coming from.

 

[Scottydoggs]

could be a busted hose to the evap system to the tank or purge solenoid, or a rusted out line. my car the vent tube next to the filler tube was rusted apart. thats a huge ass leak.

 

[Gregorius]

Changed fuel pump/sender lately? Had the tank open? That damned-able gasket around the top of the pump ass'y will leak if not installed right..