OBD2 Scan Tool, this tool allows you to easily diagnose fault codes on all vehicles up to 2013, it allows you to see what the code is, what the exact problem is, the part you need, average & cost of part, also clears all codes & light on the dash. Ables you to know exactly what's wrong whether you fix it yourself or have a mechanic do it for you. Note this does not do the tire pressure sensors. Used this a couple of times on my 2012 Jeep, now I have newer cars so I purchased a new one..