OBD question

Hi, on my 04 Cirrus I was getting a P0455 OBD error code, I cleared the code and then tired tighting the gas cap and attemped to see if I could get the computer to give me the code again, now after I scan I am getting "No codes found" does this mean that the problem is solved or do I have to give it a few days to see if the system will refresh the code. Thanks