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Hello and welcome
Is the check engine light still on, if all lights are off it's possible that they have cleared the codes in the computer,
The check engine light will turn other lights like abs/trac control on, even though there is nothing wrong with these they are disabled as long as the check engine light stays on. As far as the P0441 and 455 are concerned, the 441 is a purge valve malfunction, the 455 is a gross leak at the evap system which they diagnosed as the charcoal canister leaking.
What I would recommend doing at this time is to replace the gas cap with an OEM part and replace the purge vsv located near the air filter attached to a hose coming from the engine and going back o the fuel tank. Do this first and clear all codes and see if the lights turn back on.
Do the lights go off without putting it in drive, if you just let it idle?