U480 OBDII Check Engine Auto Scanner Trouble Code Reader This unit actually works with 1996 - 2003 cars and trucks only. It does not work with CAN protocol which is used by most 2004 and newer cars Reads and clears generic and manufacturer specific Diagnostic Trouble Codes (DTC) and turns off check engine light Supports multiple trouble code requests: generic codes, pending codes and manufacturer's specific codes Stand-alone unit with no need for an additional laptop computer to operate Highly reliable and accurate, Easy-to-read crystal-clear backlit 2-line LCD display