Ninebot ESX Error Code 21: Difference between revisions
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Revision as of 23:07, 21 February 2021
"Battery Communication Error, Please check the Battery, Control Board & related connections"
Cause
Often error 21 is caused by a disconnected BMS cable.
Regardless, this error indicates that the ESC/DRV is not able to communicate with the BMS.
This can happen if the BMS/battery is dead or if the cable has come unplugged.