This app will help you understand your check engine codes. It contains OBD I for most models and OBD II codes for all models. There are over 1,200 generic OBD II codes and over 13,500 total OBD I & II codes in our database that covers over 50 automobile models. This app also features an internet look up so if you would like more information about your code its just a click away. Database is internal so if you don't have internet the look up will still work. This app works with all tablets and features app to SD card.