This code signals a problem detected by the rotor position sensor. Most likely, there is poor connection between the rotor position sensor and motor control module. Not unlikely, the rotor position sensor is not functioning properly.
If it is due to poor wiring:
- Check the connectors of the rotor position sensor and the motor control module for rust and clean them, if necessary.
If it is because of the rotor position sensor:
- Check it with an R.P.S. tester and replace it if it proves to be faulty.
If it is because of the motor control module:
- Replace the module
If it is because of the rotor:
- Make sure the tight type of rotor is installed in the machine.