Massey Ferguson 4360.04 – Engine Control Unit (ECU): Issue With The DOC Inlet Temperature Sensor (ECU)

The DOC inlet temperature sensor voltage is below normal. This typically points to a short to ground in the sensor circuit, a damaged wiring harness, or a completely failed sensor. The sensor's job is to report the temperature of the exhaust stream entering the Diesel Oxidation Catalyst (DOC) to ensure the emission control system functions correctly.

• 4710
• 7724S
• 5712SL
• Interim Tier 4 (2012-2015)
• 7722
• 7722S
• 7615
• 5613
• 5713SL
• 7720S
• 7716
• 7718
• T4
• 7715
• 5710SL
• 7726
• 7616
• 7618
• 5608
• 4708
• 7619
• 7626
• 7726S
• 7624
• 4707
• 4709
• 5711SL
• 7614
• 7718S
• 5610
• 7620
• 7719
• 7714
• 7716S
• T4 (2015-2021)
• 5612
• 7622
• 7720
• Tier 4 (2015-2021)
• 5611
• 7715S
• 5609
• 7724
• 6612
• 6613
• 6614
• 6615
• 6616
• 6712
• 6713
• 6714
• 6715
• 8650
• 8660
• 8670
• 8680
• 8690
• 8727
• 8730
• 8732
• 8735
• 8737
• 8740
• 9540
• 9560

1. 1

   Check DPF system operation to see if the soot load is high or if the tractor is requesting a parked regeneration.

2. 2

   Visually inspect the wiring harness leading to the DOC inlet temperature sensor. Look for chafed wires, melted insulation from exhaust heat, or a short circuit to the chassis ground.

3. 3

   Use a diagnostic tool to read live data from the DOC inlet sensor. If the reading is erratic, stuck at a default extreme, or drops out, the sensor is likely faulty.

1. 1

   Safety First

   Ensure the tractor is turned off and the exhaust system (DOC/DPF assembly) has completely cooled down to prevent severe burns.

2. 2

   Locate the Sensor

   Locate the DOC inlet temperature sensor on the exhaust aftertreatment assembly (upstream of the Diesel Oxidation Catalyst).

3. 3

   Disconnect Wiring

   Unplug the 2-pin electrical connector from the sensor. Inspect the connector pins for corrosion or damage.

4. 4

   Remove the Sensor

   Using the appropriate wrench, carefully unscrew the temperature sensor from the exhaust pipe. (Penetrating oil may be required if the sensor is seized from exhaust heat).

5. 5

   Install the New Sensor

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

6. 6

   Reconnect and Clear Codes

   Reconnect the 2-pin electrical harness. Turn the key to the ON position, connect your diagnostic tool, and clear the 004360.04 fault code.

7. 7

   Verify Repair

   Start the engine and monitor the DOC inlet temperature via live data to ensure it rises smoothly as the exhaust heats up. If necessary, initiate a manual DPF regeneration to confirm the system is fully operational.