How to solve the error code E025?

1.First disconnect the brakes separately, disconnect the left and right brake disconnect switch harnesses and check which side of the brake is bad (fault code disappears after the bad brake is disconnected)

2. Check if the brakes are flipped in place, if they are, disconnect the brake quick release wires and reinsert them.

3. If the brakes are not back in place, squeeze the brakes and release them quickly and they will return.

4. This error code indicates a problem with the throttle knob. Try disconnecting the 
handlebar cable and reconnecting it, if the error persists, the throttle knob will need to be replaced!