Check you regen contactor. Run self test and grab the contact tips. The contator will be very soft when it applies and it won't hold if you pull on it. I don't know why it loggs a speed sensor code when this contactor fails but it does. If you are looking at the pannel, the regen contactor is on the far right. Good luck
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.