Massey Ferguson 100.16 – ECU: Engine Oil Pressure Too High

The control module senses an oil pressure input voltage that is higher than expected, often detected even at 0 RPM (when the engine is off). This almost always indicates an electrical issue such as a failed sensor, an open circuit, or a short to voltage in the wiring harness rather than a true mechanical over-pressure condition.

• 4710
• 7724S
• 5712SL
• Interim Tier 4 (2012-2015)
• 7722
• 7722S
• 7615
• 5613
• 5713SL
• 7720S
• 7716
• 7718
• T4
• 7715
• 5710SL
• 7726
• 7616
• 7618
• 5608
• 4708
• 7619
• 7626
• 7726S
• 7624
• 4707
• 4709
• 5711SL
• 7614
• 7718S
• 5610
• 7620
• 7719
• 7714
• 7716S
• T4 (2015-2021)
• 5612
• 7622
• 7720
• Tier 4 (2015-2021)
• 5611
• 7715S
• 5609
• 7724

1. 1

   Perform a Key-On, Engine-Off test: Turn the ignition ON without starting the engine (0 RPM) and read live data for engine oil pressure. A high reading indicates a strictly electrical issue.

2. 2

   Visually inspect the engine oil pressure sensor on the engine block. Disconnect the pigtail and check the connector for water ingress, corrosion, or pushed-out pins.

3. 3

   Test the wiring harness between the sensor connector and the ECU for continuity, looking for an open circuit or a short to power.

4. 4

   If the sensor voltage only spikes when the engine is running (mechanical cause): Connect a mechanical oil pressure gauge to the engine block to verify actual oil pressure and rule out a stuck oil pressure relief valve.

1. 1

   Turn off the tractor, remove the key, and disconnect the negative battery cable to protect the ECU.

   Turn off the tractor, remove the key, and disconnect the negative battery cable to protect the ECU.

2. 2

   Locate the engine oil pressure sensor on the engine block.

   Locate the engine oil pressure sensor on the engine block.

3. 3

   Depress the locking tab and disconnect the electrical harness from the sensor.

   Depress the locking tab and disconnect the electrical harness from the sensor.

4. 4

   Using an appropriately sized deep socket or wrench, carefully unthread the faulty oil pressure sensor from the engine block. Have a rag ready to catch any residual oil.

   Using an appropriately sized deep socket or wrench, carefully unthread the faulty oil pressure sensor from the engine block. Have a rag ready to catch any residual oil.

5. 5

   Inspect the threads on the engine block and clean them if necessary.

   Inspect the threads on the engine block and clean them if necessary.

6. 6

   Install the new OEM engine oil pressure sensor. (If the new sensor does not have pre-applied thread sealant, apply a small amount of liquid thread sealant—do not use Teflon tape as it can break off into the oil gallery). Tighten to the manufacturer's specified torque.

   Install the new OEM engine oil pressure sensor. (If the new sensor does not have pre-applied thread sealant, apply a small amount of liquid thread sealant—do not use Teflon tape as it can break off into the oil gallery). Tighten to the manufacturer's specified torque.

7. 7

   Reconnect the electrical harness, ensuring it clicks securely into place.

   Reconnect the electrical harness, ensuring it clicks securely into place.

8. 8

   Reconnect the battery.

   Reconnect the battery.

9. 9

   Turn the key to the ON position and use a diagnostic tool to clear the 000100.16 fault code from the ECU.

   Turn the key to the ON position and use a diagnostic tool to clear the 000100.16 fault code from the ECU.

10. 10

    Start the engine, check for oil leaks at the sensor base, and verify that the fault code does not return.

    Start the engine, check for oil leaks at the sensor base, and verify that the fault code does not return.