John Deere 100.02 – ECU: Engine Oil Pressure Sensor Signal Shows Pressure With Engine Not Running

This condition indicates an anomaly where the engine oil pressure sensor is not registering as zero when the engine is off. It suggests a potential issue with the oil pressure sensor itself or the electrical circuit connected to it, which is incorrectly signaling residual or phantom pressure.

• 5085E
• 5090E
• 5090EL
• 5100E
• 5085M
• 5100M
• 5100MH
• 5100ML
• 5115ML
• 5090M
• 5115M
• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 8310RT
• 8335RT
• 8360RT
• 8245R to 8400R
• 7200J
• 7760
• 7180 through 7980
• 350D
• 400D
• 700J
• 3029

1. 1

   Cycle the power to the tractor (turn off and back on) to see if the code clears

2. 2

   Inspect the wiring harness and connector at the engine oil pressure sensor for damaged wiring, faulty connections, or a short to voltage (which can cause an artificially high reading)

3. 3

   Verify the physical engine oil level

1. 1

   Turn off the machine

   Turn off the machine and ensure the engine is completely stopped.

2. 2

   Locate the sensor

   Locate the Engine Oil Pressure Sensor on the engine block.

3. 3

   Inspect the harness

   Disconnect the electrical harness from the sensor and inspect the pins for corrosion, moisture, or damage.

4. 4

   Test the circuit

   Test the circuit with a multimeter to ensure there are no shorts to a 12-volt power source in the wiring harness.

5. 5

   Evaluate sensor failure

   If the wiring and connector are in good condition but the ECU still reads phantom pressure, the sensor itself has failed internally.

6. 6

   Remove the sensor

   Remove the faulty Engine Oil Pressure Sensor.

7. 7

   Install the new sensor

   Install the new OEM replacement sensor (ensure the threads are clean and use appropriate thread sealant if not pre-applied).

8. 8

   Reconnect the harness

   Reconnect the electrical harness.

9. 9

   Verify the repair

   Turn the key to the ON position (without starting the engine) to verify that the 000100.02 code has cleared and the oil pressure now reads zero.