Case IH 19060 (DTC 9E6E) - ECU – Electronic Engine Control Unit (ECU): CAN timeout error from upstream NOx sensor

The upstream Nitrogen Oxide (NOx) sensor, which is located before the Selective Catalytic Reduction (SCR) catalyst to measure raw engine-out NOx values, has stopped communicating or sending messages on the CAN bus network.

• MAXXUM T4E
• 240 Series Combines (5140, 6140, 7140, 7240, 8240, 9240)
• Magnum 180
• Magnum 200
• Magnum 220
• Magnum 240
• Magnum 250
• Magnum 280
• Magnum 310
• Magnum 340
• Puma 150
• Puma 150 CVT
• Puma 165
• Puma 165 CVT
• Farmall 110A
• Farmall 120A
• Farmall 130A
• Farmall 140A
• Patriot 2250
• Patriot 3240
• Patriot 3340
• Patriot 4440
• Titan 3040
• Titan 3540
• Titan 4040
• Titan 4540

1. 1

   Verify that the sensor has not been physically removed or unplugged (related code 19061 indicates possible removal).

2. 2

   Inspect the electrical connections and wiring harness leading to the upstream NOx sensor for damage, corrosion, or loose pins that could interrupt CAN bus communication.

3. 3

   Ensure the sensor is receiving proper 12V supply voltage (related code 19063 indicates supply voltage out of range).

1. 1

   Locate the Sensor

   Find the upstream NOx sensor, which is mounted in the exhaust pipe before the SCR catalyst.

2. 2

   Disconnect the Battery/Power

   Ensure the machine is turned off to prevent electrical shorts.

3. 3

   Disconnect the Harness

   Unplug the electrical connector linking the NOx sensor to the vehicle's wiring harness.

4. 4

   Remove the Sensor

   Using a specialized NOx/O2 sensor socket (typically 7/8"), carefully unscrew the faulty sensor from the exhaust pipe.

5. 5

   Install the New Sensor

   Inspect the exhaust mounting port, clean the threads if necessary, and thread the new upstream NOx sensor into place, tightening it securely.

6. 6

   Reconnect

   Plug the new sensor's electrical connector back into the wiring harness.

7. 7

   Clear Codes

   Use a diagnostic tool to clear the 19060 (9E6E) fault code from the ECU and run the machine to verify the check engine light remains off.