code 9 is fwd and reverse switches closed at the same time
*(bad directional switch or circuit, or needs adjustment)
*(short between batt pos and P4 or P5)
*(bad motor controller)


code 64 is The line driver input (at P17) is less than 12% of battery voltage.
*(connection at P17 is either faulty or motor controller is bad)

Before you go ordering a new motor controller you might want to check the wiring and connections in the connectors REAL GOOD, it could just be a bad connection.