Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
E1 is a general error message, unless followed by something more indicative such as
A general failure message means, that your treadmill has something wrong with it... and that's about it, I'm sorry to say.
Probably being moved affected it. Depending upon how roughly it was moved, it might be this or that wrong with it. The thing to do is to open it and examine it thoroughly in all details, connections, moving parts, etc.
If it runs for a little while though, that means it has enough capability to run at all, which rules out a number of things. The most likely thing to check on a treadmill that runs for a little while is, the calibration of the speed sensor.
Let me know if there is more I can do to help with this, including listings of treadmill repair co.s in your region, etc.