John Deere 98.09 – Engine Control Unit (ECU): Engine Oil Level Sensor CAN BUS Message Issue / Incorrect CAN Bus Message, Information from Engine Oil Level Sensor

The Engine Control Unit (ECU) has detected a loss of communication with the engine oil level sensor over the CAN bus network. This indicates an abnormal update rate where the controller is not receiving the sensor's signal at the expected frequency, pointing to a wiring, network, or sensor failure.

• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6230R
• 6250R
• 1023E
• 1025R
• 2025R
• 3038E
• 4066R

1. 1

   Verify the code using the machine's monitor to determine if it is Active or Stored

2. 2

   Perform a visual inspection of the engine oil level sensor, its connector, and the wiring harness for damaged wires, loose connections, or corrosion

3. 3

   Test the sensor output and wiring for continuity and proper voltage to rule out a short or open circuit

4. 4

   Check battery connections and main grounds, as poor voltage can cause CAN bus communication errors

1. 1

   Disconnect Power

   Turn off the machine and disconnect the battery to prevent electrical shorts while working on the CAN bus system.

2. 2

   Access the Sensor

   Locate the engine oil level sensor on the engine block/oil pan.

3. 3

   Inspect and Repair Wiring

   If the diagnostic checks revealed damaged wiring or a loose connector, repair the harness or replace the connector pigtail.

4. 4

   Replace the Sensor

   If the wiring is intact but the sensor is failing to communicate, remove the faulty engine oil level sensor and install the replacement part. Refer to the John Deere Component Technical Manual (CTM) for specific torque specifications.

5. 5

   Clear Codes and Test

   Reconnect the battery, turn the key to the ON position, and reset the Engine Control Unit (ECU) to clear the error code. Run the machine and monitor the system to ensure the CAN bus message issue does not return.