Quote Originally Posted by Andrew_99GTP View Post
I have had that same problem with my pt a couple times too. I can't remember what I all did though. I know if you have too many of the little windows open at one time it screws things up. I am talking about the little parameter windows. Have you tried closing all the parameter windows and starting over?
Yup, this was my thought. I was trying to pinpoint a misfire. So I had all of my regular PIDs. Then added the misfire ones, and the misfire histories. Ended up being too much and wouldn't scan anything. Got rid of the PIDs I didn't need, and all was well again. Stumped me for a bit though.