John Deere PTP123.18 – PTP: Vehicle System Recovery Required

The Power Train Control Unit (PTP) has detected a 'Clutch Partially Engaged' or 'Transmission clutch slip high' condition. This indicates that a transmission clutch is not fully engaged when commanded, or there is excessive slippage within the clutch pack. This often occurs if an operator attempts to shift into higher gears (e.g., above 13F) with the clutch pedal partially depressed, resulting in low clutch pressure. The system requires the vehicle to be returned to Neutral or Park to attempt recovery and protect the transmission from damage.

• 8100
• 8200
• 8300
• 8400
• 9120
• 9220
• 9320
• 9420
• 9520

1. 1

   Review operator practices to ensure the clutch pedal is not being 'ridden' or partially depressed during shifts

2. 2

   Check transmission/hydraulic oil level according to the manufacturer's procedure, which may involve running the tractor for a specific duration at a certain RPM to get an accurate reading, as low fluid can cause slippage

3. 3

   Cycle the key switch or follow the CommandCenter™ solution and cycle tractor power to see if the code clears

4. 4

   Check the CommandCenter™ for any other active diagnostic trouble codes related to the PTP

5. 5

   Visually inspect around the batteries and alternator for damage or debris that could cause electrical issues

1. 1

   Perform initial recovery procedure

   Bring the tractor to a complete stop and move the shift lever to the 'Park' or 'Neutral' position to allow the system to attempt an automatic recovery.

2. 2

   Inspect clutch pedal and switch

   Ensure the clutch pedal returns to its fully released position. Inspect the return spring for weakness or breakage. Check the clutch engaged switch for proper operation, as a faulty switch can falsely signal a partially engaged clutch.

3. 3

   Test clutch pressure sensor/switch

   Test the clutch pressure sensor circuit voltage and check the physical pressure at the sensor port to ensure it is functioning correctly.

4. 4

   Perform Powershift Transmission calibration

   Warm the transmission oil above 35°C (95°F). Park on a level surface, access calibration mode through the CommandCenter display (PTP controller), and follow on-screen prompts to calibrate. This typically involves setting the engine to a specific RPM and moving the shift lever as directed.

5. 5

   Contact dealer for advanced diagnostics

   If the issue persists, contact an authorized John Deere dealer for advanced diagnostics involving internal transmission pressures and components using Service ADVISOR™.