Yes, BUT you need a BT CAN service key to do it.

Truck OFF, connect BT CAN key.

Press & hold a horn button

Turn truck ON

Look at the display & release the horn button when P is shown

Use the throttle butterfly to scroll to parameter 25

Press the horn button, display will flash.

Use the throttle butterfly again to scroll to 0

Press the horn button again to save the value

Turn the truck OFF & remove the CAN key.

Job done