A common mistake is trying to turn on your eBike whilst putting weight on the pedals (Error Code W013). Your eBike will not turn on properly like this. Always make sure that when you turn your eBike on that the bike is stationary, preferably on a level surface and that the pedals aren't touching anything. If the display shows a different Error Code please first reference this page to help resolve the problem. Always check that your spoke magnet is in place. As you would imagine, the spoke magnet is a small round magnet that is attached to one of the spokes on your rear wheel. This works in conjunction with the Speed Sensor to send information to the motor. The bike will not work without the Spoke Magnet or if it is not aligned properly. It is a good idea to always carry a spare Spoke Magnet with you on rides. They are relatively cheap and are availble at all Shimano authorized bike shops and Service Centers.