ANCEL AD310 is a great upgrade from more basic diagnostic code readers. The major function of this scanner is detecting the Engine System, reading and erasing error codes. 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 on, AD310 is the first tool you need to have to help you determine the cause and find a solution.