Abstract: A method for diagnosing the function of an exhaust gas sensor in an exhaust gas. The function is evaluated here according to whether during a heating phase an operating temperature of the exhaust gas sensor has been reached for a predefined time period. It is taken into account here whether during the heating phase sufficient heating power has been available to carry out a successful heating phase.

Abstract: A method is provided for monitoring at least one sensor of a vehicle, which has means for wireless communication, wherein measured values of the at least one sensor are compared to measured values of at least one comparison vehicle with the aid of the means for wireless communication.

Abstract: A method is provided for monitoring at least one sensor of a vehicle, which has means for wireless communication, wherein measured values of the at least one sensor are compared to measured values of at least one comparison vehicle with the aid of the means for wireless communication.

Abstract: A method is described for diagnosing the functioning of one or more variably triggerable intake valves and/or exhaust valves in an internal combustion engine, including the following steps:—determining a modeled pressure value which provides a pressure value in an air system of the internal combustion engine, the pressure variation model describing a pressure variation of an error-free internal combustion engine as a function of the operating point; providing a value for the actual instantaneous pressure in the air system; ascertaining a deviation variable as a function of the modeled pressure value and a value for the actual pressure in the air system; detecting an error in the functioning of the intake valve and/or the exhaust valve as a function of the deviation variable.