I’ve had it to two different dealers, still no solid answers, it’s throwing 219, 9,& 181 faults

Thinking you may be right with the neutral switch, or possibly the throttle only switch, RPMs just above idle are all over the place when in gear. Smart craft read out fluctuates from 750-890, down to 550 new today it the alarm will half ass chirp the RPMs will drop down to 525 and the motor will either rev up like it’s in throttle only (after being put back into neutral) or die.