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

The Engine Control Unit (ECU) has detected a signal issue from the Intake Boost Pressure Sensor, indicating it is not providing accurate pressure readings. This can be caused by the sensor's voltage being either above or below the normal range, or an open circuit. The ECU relies on this signal to regulate the turbocharger's wastegate and optimize engine performance.

• 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.