What could the problem be with my car for these codes to come up? I runs amazing so I don't think it is anything serious. I know code 300 is a Random mis-fire detected and a 1301 is a Cylinder #1 mis-fire detected. Catalyst damaging. I was told that it might just need plugs but it runs so well I just don't know.
It is a 2006 Saab 9-5 2.3T with 86k on it. If you need any more details just ask .