John Deere ECU001180.16 – ECU: Exhaust Gas Temperature Exceeds Specification

The Engine Control Unit (ECU) has detected that the exhaust gas temperature has surpassed the manufacturer's specified limits. This condition is often associated with the aftertreatment system found in Tier 4 and Stage IV engines, including the Diesel Oxidation Catalyst (DOC) and Diesel Particulate Filter (DPF). High exhaust temperatures can be a symptom of underlying issues related to combustion, airflow, or the aftertreatment system itself. When active, the ECU will typically derate the engine's power to protect it from potential damage.

• 6170R
• 6190R
• 6210R
• 210G
• 250G
• 290G
• 350G
• 380G
• 310SL
• 310SK
• 524K-II
• 624K-II
• 644K
• 724K
• 850J

1. 1

   Reduce engine speed and load immediately to prevent damage

2. 2

   Visually inspect the cooling system for debris blocking the radiator, charge air cooler, or other coolers

3. 3

   Check for low engine coolant levels

4. 4

   Inspect the air intake system for a clogged or restricted engine air filter

5. 5

   Examine the exhaust system for blockages or restrictions in the pipes, muffler, and aftertreatment components (DOC/DPF)

6. 6

   Review engine operating conditions for prolonged periods of light load or idling, which can cause soot buildup

7. 7

   Inspect the wiring harness and connectors for the exhaust gas temperature sensors for damage, corrosion, or loose connections

8. 8

   Check for faulty exhaust gas temperature sensors located before and after the turbocharger, DOC, and DPF

1. 1

   Address immediate warnings

   Reduce engine load and allow the system to cool. Cycle the power to the machine to see if the code clears, as this can sometimes correct temporary faults.

2. 2

   Clean cooling and air intake systems

   Thoroughly clean any debris from the radiator and other coolers. Replace the engine air filter if it is dirty.

3. 3

   Inspect the aftertreatment system

   Visually inspect the DPF and DOC for signs of damage or excessive soot buildup. If the DPF is clogged, perform a parked (manual) regeneration or professional servicing to remove ash.

4. 4

   Test exhaust gas temperature sensors

   Using John Deere Service ADVISOR, monitor live data from the EGT sensors to identify out-of-range readings. Check for a 5-volt supply at the sensor connector with the ignition on. Test suspected faulty sensors with a multimeter by measuring resistance while heating the sensor; compare readings to manufacturer specifications.

5. 5

   Address fuel system issues

   Replace fuel filters and consider having fuel injectors tested if an improper air-fuel mixture is suspected of causing higher exhaust gas temperatures.

6. 6

   Inspect the turbocharger

   Check the turbocharger for signs of wear, damage, or unusual noises that could lead to inefficient airflow and increased exhaust temperatures.

7. 7

   Replace faulty components

   Replace any identified faulty sensors or components. Apply an anti-seize compound to the threads of new sensors. Clear the fault codes and perform a road test or run the machine under load to ensure the issue is resolved.