Secondary Hydraulic Control Unit (SCO) Diagnostic Trouble Codes

Although the diagnostic codes listed below are not a complete list of the diagnostic trouble codes, they do reflect codes which may be observed while operating the tractor and have corrective action that the operator can take. Many codes which appear may be corrected simply by cycling key switch or by following the solution on the CommandCenter™ page, then cycling key switch.

If corrective action cannot be taken after cycling power to the tractor or if there are any questions, contact your John Deere™ dealer.

Diagnostic Trouble Code	System	Solution
SCO 000158.04	Mid-Stack SCV System	Control unit switched supply voltage low. System with restricted function. Reduce electrical load or increase engine speed to attempt vehicle recovery.
SCO 000168.03	Mid-Stack SCV System	Control unit unswitched supply voltage high. System with restricted function. Check battery.
SCO 000168.04	Mid-Stack SCV System	Control unit unswitched supply voltage low. System with restricted function. Check battery.
SCO 002602.18	Hydraulic System	Hydraulic oil level low. Increase engine rpm and limit hydraulic use to allow clean oil reservoir to refill. Check oil level according to Operator’s manual.
SCO 522161.31	Hydraulic System	Operator out of seat with SCV XII on. Return to seated position.
SCO 522162.31	Hydraulic System	Operator out of seat with SCV XIII on. Return to seated position.
SCO 522163.31	Hydraulic System	Operator out of seat with SCV XI on. Return to seated position.
SCO 522164.31	Hydraulic System	Operator out of seat with SCV X on. Return to seated position.
SCO 523786.07	Hydraulic System	SCV remote position control system stalled. Increase SCV MAX flow rate.
SCO 523788.02	Hydraulic System	Hydraulic option connector changed from startup. Reference Hydraulic Option Configuration procedure in Operator’s Manual.
SCO 523788.14	Hydraulic System	Hydraulic option connector changed from startup. Reference Hydraulic Option Configuration procedure in Operator’s Manual.
SCO 523788.31	Hydraulic System	Hydraulic option connector fault. Reference Hydraulic Option Configuration procedure in Operator’s Manual.