John Deere 2659.14 – Engine Control Unit (ECU): EGR Flow Signal Fault / Calculated EGR Flow Rate Error / EGR Flow Rate Data Invalid

This code is activated when there is a significant discrepancy between the actual Exhaust Gas Recirculation (EGR) flow signal and the expected flow calculated by the system (often based on temperature sensors and engine speed/load). The controller detects that the EGR flow rate data is invalid, which indicates a malfunction within the EGR system's ability to properly measure or regulate exhaust gases.

• 5085E
• 5090E
• 5090EL
• 5100E
• 5085M
• 5100M
• 5100MH
• 5100ML
• 5115ML
• 5090M
• 5115M
• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 8235R
• 8245R
• 8260R
• 8285R
• 8310R
• 8335R
• 8360R
• 8400R
• 8310RT
• 8335RT
• 8360RT
• 7210R
• 7230R
• 7250R
• 7270R
• 7290R
• 7310R
• 160G
• 7760

1. 1

   Check for ECU software updates (e.g., SW60454M / SW60455M) to rule out false settings of the code

2. 2

   Inspect the EGR Delta Pressure Sensor and its wiring harness for signs of damage, chafing, or short circuits to ground

3. 3

   Check the differential pressure tubes/lines connecting the exhaust manifold to the EGR Delta Pressure sensor for soot or carbon buildup

4. 4

   Measure the output voltage from the EGR flow sensor and temperature sensors to check if they are within the normal specified range

5. 5

   Look for related active or inactive Exhaust Back Pressure (EBP) or EGR valve position mismatch codes (like 2791.07) which could indicate a physically sticking EGR valve

1. 1

   Update ECU Software

   If the machine's software is outdated, flash the Engine ECU with the latest software payload to rule out a false code trip.

2. 2

   Clean or Replace Tubing

   Disconnect the metal tubes running to the EGR Delta Pressure Sensor. Blow them out with compressed air and a wire to clear any soot blockages. If they are cracked or heavily restricted, replace them.

3. 3

   Replace the Sensor

   If the wiring and tubes are clear but the sensor output voltage remains out of range or erratic during an Air Management Test, remove and replace the EGR Delta Pressure Sensor.

4. 4

   Inspect the EGR Valve

   If the sensor is reading correctly but the flow is genuinely invalid, remove the EGR valve and inspect it for heavy carbon binding. Clean or replace the EGR valve if it is sticking.

5. 5

   Calibrate and Clear

   After making necessary repairs, reset the ECU to clear the fault codes. Perform an Air Management Test (AMT) via John Deere Service ADVISOR to ensure the EGR flow readings are now within the correct range and the system functions properly.