So, you are driving a Civic Hybrid? Looking at the profile information that shows up in the upper right, I wasn't sure. I guess I'm being stupid this afternoon.

Anyway, I know that the Prius has a rather complex catalytic converter system. I believe they refer to it as 3 stage. Don't ask me what that means other than I probably has 3 different stages in it. But the only thing I have ever heard about Prius problems have been an occasional O2 sensor that got fouled and had to be replaced. And that is pretty rare.

It has been said:
Hybrid drivers come in 3 flavors, greenie, techie and cheapie. Pick any 2.
2005 Prius, Melinium Silver over gray, package 5 (AI)