Massey Ferguson E102.04 – Engine Control Unit (ECU): Intake Boost Pressure Sensor Signal Issue

The engine control module is receiving an electrical voltage signal from the boost pressure sensor that is lower than the expected operational range, indicating a short circuit to ground, an open circuit in the sensor wiring, or a completely failed sensor.

• 7616
• 5612
• 7622
• Interim Tier 4 (2012-2015)
• 7614
• 5611
• 7615
• 5610
• 5613
• 7620
• 5609
• 7618
• 5608
• 7619
• 7626
• 7624
• 3630
• 3640
• 3650
• 3660
• 4707
• 4708
• 4709
• 4710
• T4 (2015-2021)
• 5470
• 5480
• 5613 iT4 (2013-2016)
• 6460
• 6470
• 6485
• 6490
• 6495
• 6497
• 6499
• 7485
• 7490
• 7495
• 8450
• 8460
• 8470
• 8480
• 8600 Series

1. 1

   Inspect the intake manifold pressure (boost) sensor and its wiring harness for visible damage, melting, or wear

2. 2

   Disconnect the sensor and check the 4-pin connector for moisture, corrosion, or loose pins (a common cause of low voltage signals)

3. 3

   Use a multimeter to test the sensor's 5V supply wire and signal wire for continuity to the ECU, and ensure the signal wire is not shorted to ground

4. 4

   Remove the sensor and check the tip for heavy soot or carbon buildup that could block the sensor port

5. 5

   Use a diagnostic scanner to read the live MAP/Boost pressure data with the engine off; it should read atmospheric pressure (if it reads 0 or negative, the sensor or circuit is dead)

1. 1

   Power Down

   Turn off the tractor, remove the key, and allow the engine to cool.

2. 2

   Locate the Sensor

   Locate the boost pressure sensor, which is mounted directly on the intake manifold.

3. 3

   Disconnect

   Press the release tab and carefully unplug the electrical connector from the sensor.

4. 4

   Remove Sensor

   Remove the retaining bolt(s) securing the sensor to the manifold. Gently pull the sensor straight out.

5. 5

   Clean or Replace

   If the sensor is heavily caked in soot, you can attempt to clean it with a specialized electronic parts cleaner. However, if the circuit has failed internally (common with FMI 4), replacement is required.

6. 6

   Install New Sensor

   Insert the new sensor into the manifold port, ensuring the O-ring seats properly to prevent boost leaks. Tighten the retaining bolt.

7. 7

   Reconnect

   Plug the electrical connector back in until it clicks securely.

8. 8

   Clear Codes

   Turn the key to the ON position. Use a diagnostic tool to clear the E102.04 / SPN 102 FMI 4 fault code. Start the engine and let it idle for 1 minute to validate the repair and ensure the check engine light remains off.