Massey Ferguson 04.01.99 – TRANS2: Issue With Powershift P Solenoid Supply Voltage (TRANS2)

The transmission control system has detected an abnormal electrical condition—such as an open circuit, short circuit, or out-of-range voltage—on the power supply circuit dedicated to the Powershift "P" solenoid.

• 7724S
• 5712SL
• 7722
• 7722S
• 5713SL
• 7720S
• 7716
• 7718
• T4
• 7715
• 5710SL
• 7726
• 7726S
• 5711SL
• 7718S
• 7719
• 7714
• 7716S
• 7720
• Tier 4 (2015-2021)
• 7715S
• 7724
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613

1. 1

   Trace the wiring harness from the TRANS2 module to the Powershift P Solenoid for chafed wires, pinched lines, or melted insulation.

2. 2

   Disconnect the plug at the Powershift P Solenoid and the TRANS2 module to inspect pins for corrosion, moisture ingress, or pushed-back terminals.

3. 3

   With the key ON, use a multimeter to measure the supply voltage at the solenoid connector to verify if the TRANS2 module is sending the correct voltage.

4. 4

   Measure the internal resistance of the Powershift P Solenoid to check for an internally shorted coil.

1. 1

   Disconnect Power

   Always disconnect the tractor's battery before servicing transmission electrical components to prevent module damage.

2. 2

   Repair Wiring

   If the diagnostic checks reveal a broken or shorted wire in the transmission harness, splice and seal the damaged section using weather-resistant heat shrink, or replace the affected harness section.

3. 3

   Clean Connections

   If connectors are corroded, clean the pins thoroughly with contact cleaner and apply dielectric grease before reconnecting.

4. 4

   Replace the Solenoid

   If the wiring is intact but the solenoid failed the resistance test, locate the Powershift P Solenoid on the transmission valve block. Remove the retaining hardware, extract the faulty solenoid, and install the replacement part. Ensure the mounting surface is clean and O-rings are lubricated with clean transmission fluid.

5. 5

   Clear Codes

   Reconnect the battery. Use a compatible diagnostic tool to clear the 04.01.99 code from the TRANS2 module. Test drive the tractor, shifting through the powershift ranges to ensure the code does not return.