| Secondary Hydraulic Control Unit (SCO) Diagnostic Trouble Codes |
| Diagnostic Trouble Code |
Display |
Solution |
SCO 000158.04
SCO 000168.04 |
Hydraulic System |
SCO Supply Voltage Problem. Visually inspect around the batteries and alternator for any visual signs of damage or accumulated debris. Check fuse F29. Have your John Deere dealer repair as soon as possible. |
| SCO 000629.12 |
Hydraulic System |
SCO Control Unit Fault. Have your John Deere dealer repair as soon as possible. |
| SCO 000630.02 |
Hydraulic System |
SCO Calibration Fault/Data Invalid. Have your John Deere dealer repair as soon as possible. |
| SCO 000630.13 |
Hydraulic System |
SCO Calibration Fault/Not Calibrated. Have your John Deere dealer repair as soon as possible. |
| SCO 001638.02 |
Hydraulic System |
SCO Calibration Fault/Hydraulic Oil Temperature Low. Have your John Deere dealer calibrate as soon as possible. |
SCO 001961.13
SCO 001962.13 |
Hydraulic System |
SCO Calibration Fault/SCV V Not Calibrated. Have your John Deere dealer calibrate as soon as possible. |
| SCO 001963.05 |
Hydraulic System |
SCV V Flow Control Solenoid Current Low for Float Operation. Have your John Deere dealer repair as soon as possible. |
SCO 001973.13
SCO 001974.13 |
Hydraulic System |
SCO Calibration Fault, Front Hitch Raise/Lower Not Calibrated. Have your John Deere dealer calibrate as soon as possible. |
| SCO 001975.05 |
Hydraulic System |
Front Hitch Valve Flow Control Solenoid Current Low. Have your John Deere dealer repair as soon as possible. |
| SCO 002005.09 |
Communication System |
ACU Message Missing. Have your John Deere dealer repair as soon as possible. |
| SCO 002071.09 |
Communication System |
CCU Message Missing. Have your John Deere dealer repair as soon as possible. |
| SCO 521000.02 |
Hydraulic System |
Front Hitch External Switch Circuit Fault. Have your John Deere dealer repair as soon as possible. |
SCO 522281.4
SCO 522281.5
SCO 522281.64 |
Brake Cooling Electrical Malfunction |
Have your John Deere dealer repair as soon as possible. |
| SCO 523652.02 |
Hydraulic System |
Wire Connector Fault. Incompatible connection. Have your John Deere dealer repair as soon as possible. |
SCO 523662.05
SCO 523662.06
SCO 523663.05
SCO 523663.06 |
Hydraulic System |
Auxiliary Valve Solenoid Current Problem. Have your John Deere dealer repair as soon as possible. |
SCO 523695.02
SCO 523696.02 |
Hydraulic System |
Missing External Control Message for 10 Seconds. Check implement connections. If code returns, have your John Deere dealer repair as soon as possible. |
| SCO 523695.09 |
Hydraulic System |
SCV V External Control Lever Message Rate Fault. Check implement connections. If code returns, have your John Deere dealer repair as soon as possible. |
| SCO 523695.19 |
Hydraulic System |
SCV V External Control Lever Fault Message Received. Refer to implement documentation. |
| SCO 523696.09 |
Hydraulic System |
Front Hitch External Control Lever Message Rate Fault. Check implement connections. If code returns, have your John Deere dealer repair as soon as possible. |
| SCO 523696.19 |
Hydraulic System |
Front Hitch External Control Lever Fault Message Received. Refer to implement documentation. |
| Secondary Hydraulic Control Unit (SCO) Diagnostic Trouble Codes |
| Diagnostic Trouble Code |
Display |
Solution |
| SCO 523787.03 |
Hydraulic System |
SCO Supply Voltage High/Auxiliary Valve Solenoid. Visually inspect around the batteries and alternator for any visual signs of damage or accumulated debris. Have your John Deere dealer repair as soon as possible. |
| SCO 523787.04 |
Hydraulic System |
SCO Switched Supply Voltage Low/Auxiliary Valve Solenoid. Visually inspect around the batteries and alternator for any visual signs of damage or accumulated debris. Check fuse F29. If code returns, have your John Deere dealer repair as soon as possible. |
| SCO 523910.02 |
Hydraulic System |
SCO Control Unit Fault. Have your John Deere dealer repair as soon as possible. |
SCO 523930.05
SCO 523930.06 |
Hydraulic System |
Front Hitch Valve Extend Solenoid Circuit Current Problem. Have your John Deere dealer repair as soon as possible. |
SCO 523931.05
SCO 523931.06 |
Hydraulic System |
SCV V Solenoid Circuit Current Problem. Have your John Deere dealer repair as soon as possible. |
SCO 523936.05
SCO 523936.06 |
Hydraulic System |
Front Hitch Valve Retract Solenoid Circuit Current Problem. Have your John Deere dealer repair as soon as possible. |
SCO 523937.05
SCO 523937.06 |
Hydraulic System |
SCV V Retract Solenoid Circuit Current Problem. Have your John Deere dealer repair as soon as possible. |
| SCO 523942.31 |
SCV VI On |
Operator Out Of Seat With Front Hitch Valve On. See Operator Presence Sensor in Hydraulics and Selective Control Valves section. |
| SCO 523943.31 |
SCV V On |
Operator Out Of Seat With SCV V On. See Operator Presence Sensor in Hydraulics and Selective Control Valves section. |
SCO 524016.03
SCO 524016.04 |
Hydraulic System |
SCO Switched Supply Voltage Problem/SCV V and Front Hitch Valve Solenoids. Visually inspect around the batteries and alternator for any visual signs of damage or accumulated debris. Check fuse F29. Have your John Deere dealer repair as soon as possible. |
| SCO 524101.31 |
Hydraulic System |
Front Hitch Control Lever Command Missing. Have your John Deere dealer repair as soon as possible. |
| SCO 524102.31 |
Hydraulic System |
SCV V Control Lever Command Missing. Have your John Deere dealer repair as soon as possible. |