New Holland ENG 3031 – Engine Control Module (ECM) / Vehicle Control Module (VCM): Oil Pressure Sensor - Hardware Error

The engine control system has detected a physical hardware malfunction or an implausible signal coming from the engine oil pressure sensor.

• T5
• T6
• T7
• T8.xxx Series
• B110B
• LB110
• B115
• LB115
• CX Series
• CR Series
• FR Series

1. 1

   Verify Actual Pressure: Connect a mechanical oil pressure gauge to the engine block to verify that the engine is actually producing the correct oil pressure and that the issue is strictly sensor-related.

2. 2

   Inspect the Wiring Harness: Check the wiring leading to the oil pressure sensor for chafing, breaks, or melted insulation.

3. 3

   Check the Connector: Disconnect the sensor and inspect the electrical pins for moisture, oil intrusion, or corrosion, which can cause false readings.

4. 4

   Check for Port Blockage: Ensure the oil port on the engine block or filter housing isn't clogged with sludge or excessive thread sealant.

1. 1

   Locate the Sensor

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

2. 2

   Disconnect

   Carefully unplug the weather-sealed electrical connector from the sensor.

3. 3

   Remove

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

4. 4

   Prepare the New Sensor

   If the new sensor does not have pre-applied thread locker, apply a small amount of oil-safe thread sealant to the threads. Caution: Do not apply too much, as excess sealant can block the sensor's pressure port.

5. 5

   Install

   Thread the new sensor into the port by hand to prevent cross-threading, then tighten it to the manufacturer's torque specification.

6. 6

   Reconnect & Clear

   Plug the electrical connector back in until it clicks. Use a diagnostic tool or DTC eraser to clear the ENG 3031 code from the ECM memory.

7. 7

   Test

   Start the engine and verify that the oil pressure warning light goes out and the fault code does not return.