Massey Ferguson E102.18 – ECU: Intake Boost Pressure Sensor Signal Too Low
Issue description
Triggered when the measured intake manifold boost pressure drops below the minimum reference/alarm level expected by the engine controller during operation under load.
Applies to these machines
47 machines- 7616
- 5612
- 7622
- Interim Tier 4 (2012-2015)
- 7614
- 5611
- 7615
- 5610
- 5613
- 7620
- 5609
- 7618
- 5608
- 7619
- 7626
- 7624
- 4707
- 4708
- 4709
- 4710
- 5710SL
- 5711SL
- 5712SL
- 5713SL
- 6465
- 6475
- 6480
- 6490
- 6612
- 6613
- 6614
- 6615
- 6616
- 7465
- 7475
- 7480
- 7614 through 7626
- 7714 through 7726S
- 8450
- 8460
- 8470
- 8480
- 8650 through 8690
- 8727S
- 8730S
- 8732S
- 8737S
Check the cause
Check all charge air cooler (intercooler) hoses, pipes, and clamps for leaks, splits, or blow-offs (most common cause of low boost)
Inspect the turbocharger for mechanical defects, excessive shaft play, oil leaks, or a stuck wastegate
Check the wiring harness and connector at the boost pressure sensor for chafing, corrosion, or an open circuit
Evaluate engine mechanics to ensure there are no severe defects (e.g., restricted exhaust, intake blockages, or valve train issues) preventing the engine from building boost
Repair steps
Visual & Smoke Test
Visually inspect the intake tract from the turbo compressor housing to the intake manifold. Tighten any loose hose clamps. If no obvious leaks are found, a smoke test of the intake system is highly recommended to find pinhole leaks.
Wiring Verification
Disconnect the boost pressure sensor (MAP sensor) located on the intake manifold. Inspect the 3-pin or 4-pin connector for moisture or pushed-out pins. Use a multimeter to verify the 5.0V reference supply voltage and ground from the ECU.
Sensor Replacement
If the piping is completely sealed, the turbocharger is spooling correctly, and the wiring is intact, the boost pressure sensor itself has likely failed internally and must be replaced.
System Reset
After repairs, clear the fault codes using a diagnostic service tool. Alternatively, perform a manual system reset by turning the ignition OFF for a minimum of 60 seconds, then back ON.
Validation
Test drive the tractor under a heavy working load to ensure the ECU registers the correct reference boost pressure and the code does not return.
Parts you might need
(8)Boost Pressure Sensor / Intake Manifold Pressure Sensor (MAP)
837073934Ensure you match the part number stamped on the plastic body of your existing sensor.
Boost Pressure Sensor / Intake Manifold Pressure Sensor (MAP)
V837073934Ensure you match the part number stamped on the plastic body of your existing sensor.
Boost Pressure Sensor / Intake Manifold Pressure Sensor (MAP)
836666980Ensure you match the part number stamped on the plastic body of your existing sensor.
Boost Pressure Sensor / Intake Manifold Pressure Sensor (MAP)
V836666980Ensure you match the part number stamped on the plastic body of your existing sensor.
Boost Pressure Sensor / Intake Manifold Pressure Sensor (MAP)
837084326Ensure you match the part number stamped on the plastic body of your existing sensor.
Boost Pressure Sensor / Intake Manifold Pressure Sensor (MAP)
V837084326Ensure you match the part number stamped on the plastic body of your existing sensor.
Boost Pressure Sensor / Intake Manifold Pressure Sensor (MAP)
0281006102Bosch OEM part number. Ensure you match the part number stamped on the plastic body of your existing sensor.
Boost Pressure Sensor / Intake Manifold Pressure Sensor (MAP)
0281006409Bosch OEM part number. Ensure you match the part number stamped on the plastic body of your existing sensor.
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