It was not that many years ago you had to take your car or truck into a auto dealership if you needed to use a automotive diagnostic tool. In particular the automotive diagnostic tool used by most mechanics was the size of a refrigerator and was normally a Sun Systems automotive diagnostic tool. Only the trained mechanic knew how to use this tool but the times have changed. Now there are hand held diagnostic tools available that will work on any vehicle manufactured after 1995 and you do not need special training to use one. While the problem detected by the hand held automotive diagnostic tool might be beyond your ability to fix, many of the problems this tool detects will be quite easy and simple for the average home or shade tree mechanic to fix. This is especially valuable because of the amount of money you can save if you detect, diagnose and fix the problem yourself. I can see where having a diagnostic tool like this in your tool box would be well worth the investment.