The dealer using the Bosch computer app described it as motor problem. That dealer told me the Bosch policy is : do not attempt to repair, replace it. It was electronic issue. He tried to get something out of the rep but nothing was given. Since no credit or repair was offered I open the motor...
2000k on trek powerfly 2020 dead motor, no warranty valid after 2 years…. Bosch does not repair the motor, has to be sent to recycling! Great environmental attitude. Canadian service!