This error code is caused by the brake sensor failure.
I was attempting to close the gap between the handle bar and the brake lever. Based on research of the Tektro brake lever turning the nut #1 counter clockwise is supposed to move the lever closer to the handle grips. It did move the handle very slightly but then trying to move it back had no effect. Now I was getting Error Code 25 so I do more research and learn that the magnet sensor needs to be adjusted . The screw that should move the magnet away from the sensor is the 2mm screw #3. That's didn't eliminate the error code.
What DOES cause the error code to clear is pushing the lever slightly away from the grips. I thought that by doing that the little switch at #2 is triggered causing the code to clear but that's not the case. If I push that little switch with a blade, it has no effect on clearing the code.
I'm stuck. What needs to be done to clear the err 25 code?