Ninebot Max Error Code 39
"Internal Battery Temperature Sensor is abnormal. Please replace the Battery."
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 38 - Next Error Code: Ninebot Max Error Code 40
Cause
This error is caused by the battery temperature sensor reporting a value outside the expected range.
This may be because it is too hot or cold, or may be triggered for no reason.
Fix
Check the temperature of the battery in the app. If the temperature is abnormally hot, let the battery/scooter cool down a bit.
If the temperature is abnormally cold, take your scooter out of the cold and let it warm up.
If the temperature does not appear abnormal, just restart the scooter.
This has happened to me a number of times where I am braking and the error appears despite the battery being roughly room temperature.
If the issue persists frequently, it may be worth flashing custom firmware to ignore battery errors.