I bought the ThinkDiag an am happy with it. I had a P1000 code and it provided all the information on all the monitors I needed in order to figure out why it was not resetting. It also shows misfire codes by cylinder etc. I bought it on Aston1936's recommendation and seems to work great. Support is non existant but its intuitive and easy to use.

 

Does the ThinkDiag require some sort of subscription? Their site mentions needing "annual" software of some sort.

 

Yes, it requires an annual subscription which is $40 I think.