Massey Ferguson 100.18 – Engine Control Unit (ECU): Engine Oil Pressure Too Low

The engine's electronic management system has detected that the measured engine oil pressure has fallen below the normal operating range or warning limit.

• 5710SL
• 5711SL
• 5712SL
• 5713SL
• T4
• 4707
• 4708
• 4709
• 4710
• 5425
• 5435
• 5445
• 5455
• 5460
• 5470
• 5480
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 6600 Series
• 6700 Series
• 7465
• 7475
• 7480
• 7485
• 7490
• 7495
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• 7714
• 7715
• 7716
• 7718
• 7719
• 7720
• 7722
• 7724
• 7726
• 8600 Series
• 8700 Series

1. 1

   Stop Operations: Immediately stop machine operations to prevent catastrophic engine damage.

2. 2

   Check Oil Level & Condition: Check the engine oil level using the dipstick. Ensure the oil is at the correct level and is the proper type/viscosity for the operating conditions.

3. 3

   Inspect Wiring: Check the oil pressure sensor's wiring harness and connectors. Look for broken wires, an open return circuit, or a signal circuit shorted to the sensor supply or battery voltage.

4. 4

   Verify Actual Pressure: Connect a mechanical oil pressure gauge to the engine block to verify the actual engine oil pressure. Compare the mechanical gauge reading with the sensor output using a multimeter or a diagnostic tool (like the AGCO Electronic Diagnostic Tool - EDT).

1. 1

   Safely Shut Down

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

2. 2

   Verify Oil Level

   Pull the dipstick and check the oil level. If it is low, top it up to the specified level, clear the code, and retest.

3. 3

   Locate the Sensor

   Locate the engine oil pressure sensor, which is typically threaded directly into the engine block or the oil filter housing.

4. 4

   Inspect the Connection

   Disconnect the electrical plug from the sensor. Clean the terminals and inspect for moisture, corrosion, or damaged pins.

5. 5

   Mechanical Pressure Test

   Remove the electronic oil pressure sensor and temporarily install a mechanical oil pressure gauge in its place. Start the engine and monitor the pressure.

6. 6

   Determine the Fault

   If the mechanical pressure is normal: The electronic sensor is defective or there is a wiring harness issue. Replace the oil pressure sensor. If the mechanical pressure is genuinely low: Do not run the engine. Further internal mechanical diagnosis is required (e.g., checking for a failing oil pump, blocked oil filter, or worn engine bearings).

7. 7

   Install New Sensor

   If replacing the sensor, clean the threads on the engine block. Use an appropriate thread sealant (do not over-tighten) and plug the electrical connector back in.

8. 8

   Clear Codes

   Use an AGCO EDT or compatible diagnostic scan tool to clear the 00100.18 / SPN 100 FMI 18 fault code from the ECU. Run the engine to verify the code does not return and that no leaks are present.