Case IH 19060 – Engine ECU: CAN timeout error from upstream NOx sensor

The control module has lost communication with the upstream Nitrogen Oxide (NOx) sensor over the Controller Area Network (CAN) bus. The controller is no longer receiving the expected data messages from the sensor's internal module within the required timeframe.

• Tier 4b
• 7240
• 8240
• 9240
• 5140
• 6140
• 7140
• Magnum 180
• Magnum 200
• Magnum 220
• Magnum 240
• Magnum 250
• Magnum 280
• Magnum 310
• Magnum 340
• Puma 150
• Puma 165
• Patriot 2250
• Patriot 3240
• Patriot 3340
• Patriot 4440
• Titan 3040
• Titan 3540
• Titan 4040
• Titan 4540

1. 1

   Inspect the wiring harness between the upstream NOx sensor (located on the exhaust pipe before the DOC/catalyst) and the Engine ECU for chafing, heat damage, or breaks.

2. 2

   Disconnect the 5-pin sensor connector and check for moisture intrusion, corrosion, or pushed-back pins.

3. 3

   Verify that the sensor is receiving proper supply voltage (typically 12V) and has a solid ground connection when the key is ON.

4. 4

   Test the CAN High and CAN Low circuits for continuity between the sensor connector and the ECU. Ensure there are no shorts to ground or shorts to power.

5. 5

   Verify the integrity of the CAN bus terminating resistors (should read approximately 60 ohms across CAN H and CAN L with the batteries disconnected).

1. 1

   Power down the machine and turn off the master battery disconnect switch.

   Power down the machine and turn off the master battery disconnect switch.

2. 2

   Locate the upstream NOx sensor on the exhaust pipe (before the catalyst).

   Locate the upstream NOx sensor on the exhaust pipe (before the catalyst).

3. 3

   Disconnect the electrical connector and unclip the sensor's wiring harness from any retaining brackets.

   Disconnect the electrical connector and unclip the sensor's wiring harness from any retaining brackets.

4. 4

   Using a specialized NOx sensor socket or a wrench, carefully remove the sensor probe from the exhaust pipe.

   Using a specialized NOx sensor socket or a wrench, carefully remove the sensor probe from the exhaust pipe. (Penetrating oil may be required if the sensor is seized).

5. 5

   Apply a high-temperature anti-seize compound to the threads of the new sensor.

   Apply a high-temperature anti-seize compound to the threads of the new sensor (if it does not come pre-applied). Note: Do not get anti-seize on the sensor tip.

6. 6

   Install the new sensor into the exhaust pipe and tighten to the OEM torque specification.

   Install the new sensor into the exhaust pipe and tighten to the OEM torque specification.

7. 7

   Route the wiring harness exactly as it was from the factory, ensuring it is secured away from extreme heat sources, and plug in the connector.

   Route the wiring harness exactly as it was from the factory, ensuring it is secured away from extreme heat sources, and plug in the connector.

8. 8

   Turn on the battery power, connect a diagnostic tool, and clear the inactive 19060 fault code.

   Turn on the battery power, connect a diagnostic tool, and clear the inactive 19060 fault code.

9. 9

   Run the engine up to operating temperature to verify the SCR system enters dosing mode and the code does not return.

   Run the engine up to operating temperature (above 220°C / 428°F exhaust temp) to verify the SCR system enters dosing mode and the code does not return.