Try the gas cap...
Look for any cracked hoses between the fuel tank and engine.
DTC P0455: Evaporative Emission (EVAP) System Large Leak
Trouble code P0455 means:EVAP Large Leak DetectedLarge vapor leak in the evaporative emmisions systemTrouble code P0455 means: Evaporative Emission System Leak Detected (gross leak/no flow)Large vapor leak in the evaporative emmisions system
P0442: Evaporative Emission System Leak Detected (small leak) P0455: EVAP Large Leak Detected
Large vapor leak in the evaporative emmisions system
Evaporative Emission Control System Leak Detected(Gross Leak)....meaning large leak within the fuel evaporative system. Sometimes this code can be caused simply by just a faulty gas cap.
Trouble code P0455 means: Evaporative emission (EVAP) control system leak detected (no purge flow or large leak)
No, that code is for the evaporative emissions control system in the fuel tank. It has nothing to do with the catalytic converter.
Continuous Memory Diagnostic Trouble Code (DTC) P0455 indicates that the Evaporative Emission (EVAP) control system detected a large leak or no purge flow. Start by making sure the gas cap is tight, (3 clicks). Check all the hoses for cracks or leaks. Replace the gas cap if necessary.
EVAP Emission Control System Leak (Large)
P0455 - Evap Emission Control System Leak Detected ( no purge flow or large leak )
Trouble code P0455 means:Evaporative emission (EVAP) control system leak detected (no purge flow or large leak)
EVAP emission control system leak (large). Check to see if the fuel cap is missing or loose.