There are several key differences between the throttle sensor and the accelerator pedal sensor. First, the throttle sensor measures the angle of the throttle valve, while the accelerator pedal sensor measures the pedal depression angle. Second, the throttle sensor is used to detect engine load, while the accelerator pedal sensor is used to detect the driver’s intention. Third, the throttle sensor is installed on the throttle body, while the accelerator pedal sensor is installed on the accelerator pedal.