This works perfectly. You plug this into the OBDll plug in you vehicle and follow the onscreen prompts. The code reader scans for codes and you can read them right on the screen. It is super easy to use. The reader is very compact and seems to be made well. I love the fact that it doesnt take any mechanical ability at all and I can see what is wrong with my car before taking it to the shop. This keeps me from possibly being sold things that I do not really need. I think it is a great tool for women to have.