E031 Code
Check Detroit E031 e-Bike Error Code :
Indication conditions
The chain tension may not yet be adjusted or the crank may not be installed in the proper position.
Operational restrictions being displayed
Assist will not be provided when riding.
Solution
Have your place of purchase perform the following:
Adjust the chain tension.
Re-install the crank in the specified direction, then turn the power back ON.
If the error persists, contact your distributor for assistance.