Originally Posted by ItalianJoe1

How does a flashing CEL indicate a cat problem? You should probably learn a bit more about that.

I see you post a lot in the problems/service section, and a lot of your replies are just guesses. I'm sure people appreciate the help, but sometimes it's better to stay quiet than give wrong information. I'm a master tech and do this for a living, and still if I don't know what's wrong I will say so.

Originally Posted by kzak104

a flashing cel means there is a possibility damage to the cat will result, a misfiring cylinder will dump unburnt fuel causing the cat to overheat, which can damage it.

but a master tech would know that.... right?