A method for monitoring a pressure sensor, which determines a pressure in a pressure accumulator regulated by a pressure actuator, includes the steps of calculating an expected pressure value in the pressure accumulator for a given point in time based on a holding pressure preset by the pressure actuator and based on a detected rate of change in a mass balance of a medium contained in the pressure accumulator. A pressure value in the pressure accumulator is determined with the pressure sensor at the given point in time. The expected pressure value is compared with the determined pressure value and a malfunction in the pressure sensor is detected if the pressure values deviate from each other beyond a predetermined value. A device for monitoring a pressure sensor is also provided.