It means EVAP system Gross (large) leak. could be a gas cap not tight, purge valve worn out in vapor canister or vacuum leak somewhere in the lines to canister.
Fuel leak? Charcoal canister?
There are pressurised gases in the canister. The heat causes the canister to explode.
A leak.
Fuel leak? Defective carbon canister?
canister vent or purge valve malfuction vacuum leak or sticking vlave
Broken or split hose Radiator leak heater core leak
Fuel leak at hose or fitting Carbon canister is exhausted
Overfilling the fuel tank with gas could be a reason.
replace the carbon canister
It's a leak in your evaporative emission system. Causes: *Loose or missing fuel cap. *Evap canister broke, hose cracked or not connected. *Purge or vent solenoid defective
It's a leak in your evap system. Causes: *Loose or missing fuel cap. *Evap canister broke, hose cracked or not connected. *Purge or vent solenoid defective *Vacuum leak at engine This is what a diagnostic test told me about my 2003 D. Caravan with the same po456 code.