D05 is a carburetion checking system for LPG/CNG cars, programmable and self fitting, managed by a microprocessor which maintains the stoechyometric level of AIR or GAS(CNG or LPG) in every working condition within the best value. It has different programmable functions adapted to different systems and models of cars. It does not need any further devices. Moreover, it can simulate the proper working of the lambda probe without adding external emulators. The setting of the gas happens through an electromechanical actuator.