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0442 evap emission control system malfunction(small leak detected) 0443 evap emission control system purge control valve circuit malfunction 0450 evap emission control system pressure sensor malfunction 0455 evap emission control system malfunction(gross leak detected) there ya go
Most likely it means your gas cap is loose... or whats called an evap system leak.
EVAP control system leak detected, very small leak
EVAP Emission Control System Leak Detected (Control Canister System)
EVAP Emission Control System Leak (Large)
Evaporative Emission Control System Leak Detected (small leak) It is a very small leak in your EVAP control system. In fact it could be as small as 0.04' in in diameter.
Code P0455 means EVAP control system,big leak detected
Trouble code P1457 means: EVAP Emission Control System Leak Detected (Control Canister System) Need to check the EVAP canister for leaks in the hoses
Trouble code P1456 means: EVAP Emission Control System Leak Detected (Fuel Tank System)
Trouble code P0442 means:Evaporative emission control system leak detected (Small leak)
P0456 EVAP emission control system leak
P0455 - Evap Emission Control System Leak Detected ( no purge flow or large leak )