Launch EZcheck is a new diagnostic code reader trusted by mechanics and developed by Professional Engineers in 2017. Having complete access to engine control units, it ia as easy to use as handheld code reader plus the benefits of your smartphones. Once plugged into your vehicle's 16pin OBDII DLC, the unit will power up and prompt you to start your ignition. If your vehicle has a Check Engine Light comes on, you can use EZcheck to read the error codes, find out what the problem is, and perhaps fix it. Save your time and money before going to a workshop.