CP9125 Actron PocketScan™ Code Reader is an easy-to-use tool for novice and light-to-moderate DIY customers. It enables the user to read OBD II diagnostic trouble codes (DTCs) from the on-board computers of 1996 and newer cars and light trucks. This gives the user the ability to quickly determine the cause of the “Check Engine” light coming on. Once repairs are made, the PocketScan™ allows the user to clear the trouble codes and turn off the light.