It's an Awesome Machine ! It is so very easy to use, you just plug it in into the fitting in your car and start your car ! All the Codes come up and you just look up that code and it will tell you if their is something bad or if something will need replacing soon. It has saved me a lot of money since I didn't need to pay a mechanic to do it for me, and also being a woman, it allowed me to have an advantage of looking up what was needed and what that part did in my car ! Finally, I felt in control knowing what was wrong and not bing talked into all the things mechanics like to talk a lot of women into because of a lack of knowledge !!