R&R Forward/Reverse pot, get with Crown dealer and get OE Parts. New OE kits come with a set of plastic bushings for the controls to ensure pot does not exceed limits. Make sure when you install test the repair by operating like an operator would and push/pull the throttle control as hard as you can. If you have access to the Curtis handheld you should clear the codes so you can see if the event code returns, if issue persists you may have to flash the new X10 handle software to the Access module through the Crown software if you have access or may have to call Crown in.