If the key switch is turned on and the unit goes thru self test then gives this code check this. Turn key switch off then back on, listed for the steering to cycle thru, if the steering does not cycle thru check the 10amp fuses on the controller. If the 10amp fuses are good pull the cover off the controller and check the 250amp and 450amp fuses. Our techs have been finding these fuses are open and bluish in color. Check battery both static and load test. Not saying this is the end all to fix this problem but a good place to start.