Chassis Control Unit (CCU) 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.

Central Control Unit (CCU) Diagnostic Trouble Codes
Diagnostic Trouble Code	Display	Solution

CCU 96.17	Fuel Level Low	Refuel.
CCU 1086.18	Air Brake Pressure Low	Allow pressure to increase. Bleed moisture from system.
CCU 1086.18	Air Brake Pressure Low	Allow pressure to increase. Bleed moisture from system.
CCU 1638.0	Hydraulic Oil Temperature High	Reduce load. Check cooling system for debris.
CCU 1638.0	Hydraulic Oil Temperature High	Reduce load. Check cooling system for debris.
CCU 1638.16	Hydraulic Oil Temperature High	Check cooling system for debris. Check hydraulic oil level.
CCU 1638.16	Hydraulic Oil Temperature High	Check cooling system for debris. Check hydraulic oil level.
CCU 1713.0	Hydraulic Oil Filter Restricted	Replace hydraulic filters.
CCU 1713.0	Hydraulic Oil Filter Restricted	Replace hydraulic filters.
CCU 1883.0	Rear PTO Speed High	Check engine RPM.
CCU 1883.0	Rear PTO Speed High	Check engine RPM.
CCU 1883.1	Rear PTO System	Check engine speed. Cycle PTO switch to attempt vehicle system recovery.
CCU 1883.1	Rear PTO System	Cycle PTO switch to attempt vehicle system recovery.
CCU 2602.1	Hydraulic oil level low	Check oil level.
CCU 2602.1	Hydraulic oil level low	Check oil level.
CCU 2602.18	Hydraulic oil level low	Check oil level.
CCU 2602.18	Hydraulic oil level low	Check oil level.
CCU 522384.14	Rear PTO System	Reduce ground speed.
CCU 522384.14	Rear PTO System	Reduce ground speed.
CCU 523698.9	Implement Mgmt System	Check connection.
CCU 523698.9	Implement Mgmt System	Check connection.
CCU 523749.16	Rear PTO System	Allow PTO clutch to cool for 15 seconds before attempting re-engagement.
CCU 523749.16	Rear PTO System	Allow PTO clutch to cool for 15 seconds before attempting re-engagement.
CCU 523916.0	Hydraulic oil filter bypassed	Replace hydraulic filters.
CCU 523916.0	Hydraulic oil filter bypassed	Replace hydraulic filters.
CCU 523916.15	Hydraulic oil filter restricted	Replace hydraulic filters.
CCU 523916.15	Hydraulic oil filter restricted	Replace hydraulic filters.
CCU 523916.16	Hydraulic oil filter bypassed	Replace hydraulic filters.
CCU 523916.16	Hydraulic oil filter bypassed	Replace hydraulic filters.
CCU 524016.4	Electrical system	Reduce electrical load or increase engine RPM to attempt vehicle system recovery.
CCU 524016.4	Electrical system	Reduce electrical load or increase engine RPM to attempt vehicle system recovery.
CCU 524224.14	PTO Switch	Cycle PTO switch to attempt vehicle system recovery.
CCU 524224.14	PTO Switch	Cycle PTO switch to attempt vehicle system recovery.
CCU 524236.31	MFWD Switch	Cycle MFWD control.
CCU 524236.31	MFWD Switch	Cycle MFWD control.
CCU 524251.31	Rear PTO on	Return to seated position.
CCU 524251.31	Rear PTO on	Return to seated position.