Suzuki likes to use the term GHOST CODE when something is out of the ordinary. 4.2 is a crank posision sensor. 8.3 is electronic shift accuator. If possible try to spin your propeller with your hand. Be careful it may be in gear and the blades are sharp. if it is then you will need to resrt the shift motor to the netural posision or replace it. Find green and red wire with white connector below ecm and use 12 volt battery to reset motor. (common failure) You may want to also replace the shift posision sensor and netural safety switch. You will need a tech with Suzuki diagnostic software to perform this operation. Thank's Martin