This is the first step in troubleshooting your electric bike after receiving any sort of error code. An error code means there is not a clear connection between all of the electrical components of your bike, and you will have to go through and see where exactly that connection has become faulty.
The first step is to make sure all of your wiring cables and lcd screen are properly plugged in. If still no response, switch out your current handlebar electrical wiring and LCD screen that we send you.