The odd thing is this happened to me too. Last night. I have an LRP flow and a Reedy motor. I got the same error code. Funny thing is my Sct with a tekin RX8 and 4300hd motor did the same thing. The only common denominator is my radio. An MT 4 by airtronics. If I push the cars they roll and drive. Once I stop my cars they won't move. I'm wondering if it's a radio receiver problem.