Can ultrasonic wash out the throttle position sensor?

Arguably, it doesn't have to be broken. Because the throttle sensor is actually a potentiometer, its structure is the same as the volume rotary switch on the radio.

After washing, the idle speed is high because the throttle washes away the dirty things, so that the idle speed valve (or electronic throttle) cannot be adjusted back for a while.

It is suggested to find a special meaning and adjust the throttle parameters first.