A method and a device for handling errors of software modules for redundantly designed systems in vehicles in order to optimize error handling for redundantly designed systems in vehicles, so that errors are detected and error handling measures are introduced. In addition, error handling is configured in such a way that it can be used for a plurality of software-controlled applications that run on a control device. Furthermore, a device for performing the method uses direct and/or indirect redundant input data to determine the adjusted input data for the software modules.