A method for monitoring an installed in a motor vehicle subsystem

The invention relates to a method for monitoring of an installed in a motor vehicle subsystem, wherein a diagnostic unit, the subsystem at least checked to system errors while driving cycles of the motor vehicle in relation, wherein the verification with respect takes place both on the occurrence as well as a correction of a system error. According to the invention it is provided that the diagnosis unit performs abuse estimate the effect on the basis of a frequency for detecting the occurrence and / or the elimination of the system failure, whether the detected occurrence and / or to remedy detected system failure abuse is based. When a detected occurrence of the system error, a restriction mode is activated, or an activated restriction mode of operation continued, wherein a drivability of the vehicle is restricted after a predeterminable number of driving cycles or after a predeterminable driving distance without detection of the system recovery.