A control system for controlling an agricultural harvesting machine, comprising: a header position sensor configured to sense a position variable indicative of a position of a header on the agricultural harvesting machine relative to a surface over which it travels and to generate a sensed position signal indicative of the sensed position variable; a header position control system that is configured to receive a position setpoint value indicative of a commanded header position and the sensed position signal and to perform closed loop control of a header position actuator, that moves the header to different positions relative to the surface, based on a header position error indicated by the position setpoint value and the sensed position variable; a stability parameter sensor that is configured to sense a stability parameter indicative of a physical stability of the agricultural harvesting machine and to generate a stability parameter signal indicative of the sensed stability parameter; and a sensitivity control system that is configured to automatically obtain the header position error and the stability parameter signal and automatically identify a sensitivity value that sets a sensitivity of the header position control system in responding to the header position error and to provide a sensitivity signal, indicative of the sensitivity value, to the header position control system, the header position control system configured to perform the closed loop control of the header position actuator with the sensitivity value indicated by the sensitivity signal; wherein the stability parameter sensor comprises a header motion sensor configured to sense motion of the header that is indicative of the physical stability of the agricultural harvesting machine; wherein the sensitivity control system comprises parameter processing logic configured to generate, based on the stability parameter signal, a frequency domain representation of the sensed motion of the header and sensitivity identifying logic configured to identify the sensitivity value based on the frequency domain representation of the sensed motion of the header and the header position error; characterized in that the parameter processing logic is configured to generate the frequency domain representation of the sensed motion of the header as a ratio of a maximum frequency domain amplitude in a high frequency range and a maximum frequency domain amplitude in a low frequency range that is lower than the high frequency range. a header position sensor configured to sense a position variable indicative of a position of a header on the agricultural harvesting machine relative to a surface over which it travels and to generate a sensed position signal indicative of the sensed position variable; a header position control system that is configured to receive a position setpoint value indicative of a commanded header position and the sensed position signal and to perform closed loop control of a header position actuator, that moves the header to different positions relative to the surface, based on a header position error indicated by the position setpoint value and the sensed position variable; a stability parameter sensor that is configured to sense a stability parameter indicative of a physical stability of the agricultural harvesting machine and to generate a stability parameter signal indicative of the sensed stability parameter; and a sensitivity control system that is configured to automatically obtain the header position error and the stability parameter signal and automatically identify a sensitivity value that sets a sensitivity of the header position control system in responding to the header position error and to provide a sensitivity signal, indicative of the sensitivity value, to the header position control system, the header position control system configured to perform the closed loop control of the header position actuator with the sensitivity value indicated by the sensitivity signal; wherein the stability parameter sensor comprises a header motion sensor configured to sense motion of the header that is indicative of the physical stability of the agricultural harvesting machine; wherein the sensitivity control system comprises parameter processing logic configured to generate, based on the stability parameter signal, a frequency domain representation of the sensed motion of the header and sensitivity identifying logic configured to identify the sensitivity value based on the frequency domain representation of the sensed motion of the header and the header position error; characterized in that the parameter processing logic is configured to generate the frequency domain representation of the sensed motion of the header as a ratio of a maximum frequency domain amplitude in a high frequency range and a maximum frequency domain amplitude in a low frequency range that is lower than the high frequency range.