Ninebot Max Error Code 40

Error 40 on a Ninebot Max.

"Control Board Temperature Sensor is abnormal. Please check the Control Board."

Or in the new app:

"Controller temperature sensor error"

Read below if your Ninebot Max G30 or G2 is beeping or has a red wrench icon and flashes this code.

If you clicked the wrong error code, return to the Max G30 and G2 Error Code Index.

Previous Error Code: Ninebot Max Error Code 39 - Next Error Code: Ninebot Max Error Code 41

Cause

This can be caused by an issue with the temperature sensor on the ESC/Controller.

That can be due to overheating/under temperature or a wiring fault.

Fix

Make sure the temperature reported is not outside of the rated values.

Confirm that all wiring harnesses are securely in place.

If all else fails replace the controller.