Incode/outcode calculator is required for vehicle technicians to perform key learning, control unit replacement and other procedures. If wrong code received, please use middle section (6 characters) of code requested by car. For example- car gives the code: 0040 921D0E 000000 Use 921D0E to get correct answer. This app needs internet connection. The first code is free. It can calculate incode for various Ford, Mazda, Jaguar, Land Rover, Lincoln models. Diagnostic tools that may require this calculator: FordVCM II Rotunda, Ford vcm-obd, Ford mini-VCM, ForScan, Autocom, Forscan ELM327, FCOM, FoCOM, FVDI and others.