Method for automatic detection of a rotary encoder error of a combustion engine

The method involves providing a speed model, which provides each a model speed for multiple predetermined rotational angles of a working cycle of the internal combustion engine (1). The corresponding speed for multiple predetermined rotational angles of the work cycle is determined by a transmitter wheel (3) and a transmitter wheel sensor (4). An independent claim is also included for a device for automatically determining a transmitter wheel error of an internal combustion engine of a vehicle.