To download the most current version of OBD PC Link Software for your 3110, 3120, 3130 CanOBD2 Code Reader, please click here. To download the most current version of OBD2 TekLink Software for your 3100a, 3100c OBD2 Code Reader, please click here. WARNING: The two programs are not interchangeable. PC Link will ONLY work with the 3110, 3120, 3130 CanOBD2 Code Reader and TekLink will ONLY work with the 3100a, 3100c OBD2 Code Reader. Please verify which tool you have before proceeding.