Massey Ferguson 5035.13 – Engine Control Unit (ECU): Issue With Exhaust Top NOx Sensor Module

The system is detecting that the downstream NOx sensor (located after the DOC/SCR in the exhaust stream) is either missing its calibration data, is the wrong part number, or has a wiring fault preventing the module from reading its signal.

• 4710
• 7724S
• 5712SL
• 7722S
• 7722
• 5713SL
• 7720S
• 7716
• 7718
• T4
• 7715
• 5710SL
• 7726
• 4708
• 7726S
• 4707
• 4709
• 5711SL
• 7718S
• 7719
• 7714
• 7716S
• T4 (2015-2021)
• 7720
• Tier 4 (2015-2021)
• 7715S
• 7724
• 5708
• 5709
• 5710
• 5711
• 5712
• 5713
• 6711
• 6712
• 6713
• 6714
• 6715
• 6716
• 6718
• 7717
• 7721
• 7723
• 7725
• 8727
• 8730
• 8732
• 8735
• 8737
• 8740
• 7340
• 7344
• 7345
• 7347
• 7360
• 7370
• MF 9540
• MF 9560

1. 1

   Inspect the wiring harness leading to the downstream NOx sensor for damaged or broken wiring, loose pins, or a short circuit to ground/power.

2. 2

   Disconnect the sensor and check the connector for moisture, melted plastic, or corroded terminals.

3. 3

   Verify that the currently installed sensor is the correct OEM part, as aftermarket sensors often fail to communicate the correct calibration data to the ECU.

4. 4

   Perform a standard system reset by turning the ignition off for a minimum of 60 seconds, then turning it back on to see if the module re-establishes communication with the sensor.

1. 1

   Prep the Machine

   Park the machine on a level surface, turn off the engine, and allow the exhaust aftertreatment system to cool completely to avoid severe burns.

2. 2

   Disconnect Power

   Disconnect the negative battery cable to prevent electrical spikes to the ECU during replacement.

3. 3

   Locate the Sensor

   Locate the 'Top' or 'Outlet' NOx sensor. This is the downstream sensor located on the exhaust pipe after the SCR catalyst.

4. 4

   Disconnect the Module

   Unplug the NOx sensor's control module connector from the main engine wiring harness.

5. 5

   Remove the Sensor

   Carefully unscrew the NOx sensor probe from the exhaust pipe bung. Note: Exhaust sensors frequently seize due to heat and carbon; apply penetrating oil to the threads and allow it to soak if resistance is high.

6. 6

   Install the New Sensor

   Thread the new OEM NOx sensor into the exhaust bung and tighten to the manufacturer's specified torque.

7. 7

   Route the Wiring

   Secure the sensor's wiring harness, ensuring it is routed away from extreme heat sources and moving parts, and plug it into the main harness.

8. 8

   Restore Power & Clear Codes

   Reconnect the battery. Connect an AGCO diagnostic service tool (EDT) to clear the 005035.13 fault code. The ECU may require a forced calibration or a system reset (ignition off for 60 seconds) to recognize the new sensor's data.