Service Codes on Powershift Transmission Control Unit (PCU)

Symptom Problem Solution

CODES 8, 9, 10

Fault in transmission control unit

See your John Deere dealer.

CODE 11

Transmission oil too cold. Does not operate properly until oil has heated up

CODES 12, 23

Fault in transmission control unit

See your John Deere dealer.

CODE 30

Fault at clutch switches

See your John Deere dealer.

CODE 31

Clutch is slipping

Release or engage clutch.

CODES 39 - 45, 47, 50, 51, 63, 65

Fault in transmission control unit

See your John Deere dealer.

CODE 66

Gear engaged before engine was started

Shift to neutral and start engine again.

CODES 67, 68, 69

Fault in transmission control unit

See your John Deere dealer.

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