Mechanisms and related methods for drive by wire control systems in walk-behind working machines are provided herein. The mechanism can include a sensor and at least one resilient member. The sensor can be rotatable about a sensor axis and can be in communication with a control unit, while the at least one resilient member can cooperate with the sensor to bias the sensor about the sensor axis. Furthermore, the control unit can be configured to control an operating state of a transmission of the walk-behind machine. In addition, the mechanism can be configured such that if the drive by wire control system becomes inoperative, a change in the operating state of the transmission occurs, such that the transmission is non-operational if the drive by wire control system becomes inoperative.
