My ECU is spitting out a code 9 (cylinder sensor). I've been told that its located inside the distributor. I popped it open, but I'm not sure exactly what I'm looking for, or how to replace it. Is it something that can be swapped out, or do I have to replace the whole distributor?

I see some little clear plastic thing that has 4 wire leads coming off of it. That's about the only thing that I might be able to call a sensor!!!

Maybe it's the circular thing that I would have called a "rotor" on an older car??