Massey Ferguson 04.1.55 – TRANS: Transmission Temperature Signal Out Of Range

The transmission control module is receiving a voltage or resistance reading from the transmission fluid temperature sensor that falls outside of the expected operating parameters. This typically indicates a failed sensor, a wiring issue (open or short circuit), or an unplugged connector rather than an actual overheating event.

• 4707
• 4708
• 4709
• 4710
• T4 (2015-2021)
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 5710SL
• 5711SL
• 5712SL
• 5713SL
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• 7714
• 7715
• 7716
• 7718
• 7719
• 7720

1. 1

   Locate the transmission temperature sensor on the transmission housing and check the electrical connector for dirt, moisture, corrosion, or backed-out pins.

2. 2

   Trace the wiring from the sensor back toward the TRANS module. Look for chafed insulation, broken wires, or damage from field debris.

3. 3

   Using a multimeter, test the resistance across the sensor's pins. If the sensor reads completely open (infinite resistance) or dead shorted (zero resistance), the sensor has failed internally.

4. 4

   Verify the transmission fluid is at the correct level and is not severely degraded or contaminated, which could theoretically cause erratic temperature spikes.

1. 1

   Safety First

   Park the tractor on a level surface, engage the parking brake, and turn off the engine. Disconnect the negative battery cable to prevent electrical damage.

2. 2

   Clean the Area

   Thoroughly clean the area around the transmission temperature sensor on the transmission housing to prevent dirt from entering the transmission when the sensor is removed.

3. 3

   Disconnect

   Unplug the electrical connector from the sensor.

4. 4

   Removal

   Place a clean catch pan underneath the sensor area to catch any transmission fluid that may leak out. Unscrew and remove the faulty temperature sensor.

5. 5

   Installation

   Thread the new OEM temperature sensor into the transmission housing and tighten it to the manufacturer's torque specification.

6. 6

   Reassembly

   Reconnect the electrical connector, ensuring it clicks securely into place. Reconnect the battery.

7. 7

   Fluid Check

   Check the transmission fluid level and top up any fluid that was lost during the swap.

8. 8

   Clear Codes

   Use a diagnostic tool or the tractor's onboard diagnostic menu to clear the 04.1.55 fault code. Test drive the tractor to ensure the code does not return.