Well, it's official...

[Rusman]

One, or both, of my cats are dead. On the way home I heard a nice rattling sound which I thought was the trans. I thought it finally was going to go out after two really hard grinds on second gear. After I got home I did the hammer tap on the cat and it's all breaking up. That might be the cause of some of my hesitation/power loss at high speed, but wouldn't explain the error code I'm getting.

Oh well, soon enough I will have that part replaced.