Error 16E on the GOTRAX GX3 scooter means “The hall of the front drive motor is damaged.” Most likely cause: a problem with the motor's position (Hall) sensor or its wiring. Try this first: switch off and restart.
Hall sensors tell the controller where the motor is so it can turn it smoothly. A Hall fault can make the scooter judder, run weakly or not start. It's a support job.
Step-by-step checklist
Work from the top. Steps go from free and easy to shop jobs. Switch the scooter off before touching any connector. Tick each step as you go. Your progress is saved on this device.
When it's time for a shop: if you've worked through every step and the problem is still there, contact the brand's support or an authorized service center. Bring your notes on when it happens, plus the code.