John Deere fault codes & repair guides
All 3,995 codes· 50 per page · page 49 of 80
| Code | Controller | Issue summary | Repair manual |
|---|---|---|---|
| 4490.12 | ECU | Intake Air Humidity Fault / The Intake Air Temperature Sensor/Pressure/Humidity Has A Fault. | Full repair manual for code 4490.12, ECU |
| 4765 | ECU | Diesel Oxidation Catalyst (DOC) Inlet Temperature is Extremely High | Full repair manual for code 4765, ECU |
| 004765.00 | — | High DOC Inlet Temperature | Full repair manual for code 004765.00 |
| 4765.12 | ECU | DOC Inlet Temperature Sensor Issue / DOC Inlet Temperature Fault | Full repair manual for code 4765.12, ECU |
| ECU004765.12 | ECU | Temperature Sensor Fault Affects Exhaust Filter Cleaning | Full repair manual for code ECU004765.12, ECU |
| 4766 | — | DOC Outlet Temp Fault | Full repair manual for code 4766 |
| ECU004766.12 | ECU | Temperature Sensor Fault Affects Exhaust Filter Cleaning | Full repair manual for code ECU004766.12, ECU |
| 4766.12 | Engine Control Unit (ECU) | DOC Outlet Temperature Sensor Issue / DOC Outlet Temperature Error | Full repair manual for code 4766.12, Engine Control Unit (ECU) |
| 4766.15 | ECU | DOC Outlet Temperature Slightly High | Full repair manual for code 4766.15, ECU |
| ECU004766.15 | ECU | Unexpected Temperature in Exhaust Filter Catalyst | Full repair manual for code ECU004766.15, ECU |
| 4766.16 | ECU | DOC (Diesel Oxidation Catalyst) Outlet Temperature is Moderately High | Full repair manual for code 4766.16, ECU |
| ECU004766.16 | ECU | Exhaust Filter Temperature Higher Than Expected | Full repair manual for code ECU004766.16, ECU |
| 4766.17 | ECU | DOC Outlet Temperature Slightly Low | Full repair manual for code 4766.17, ECU |
| 4766.18 | Engine Control Unit (ECU) | DOC Outlet Temperature Moderately Low | Full repair manual for code 4766.18, Engine Control Unit (ECU) |
| 4795 | — | DPF Missing | Full repair manual for code 4795 |
| ECU004795.13 | ECU | Exhaust Filter Calibration Data Invalid | Full repair manual for code ECU004795.13, ECU |
| 4795.13 | Engine Control Unit (ECU) | The Exhaust Filter Code Is Not Accepted By The ECU / Exhaust Filter Calibration Fault | Full repair manual for code 4795.13, Engine Control Unit (ECU) |
| 004795.31 | — | Pressure Signal From The DPF Pressure Differential Sensor Missing Or Out Of Range | Full repair manual for code 004795.31 |
| 4795.31 | Engine Control Unit (ECU) | Exhaust Filter Missing or Severely Damaged | Full repair manual for code 4795.31, Engine Control Unit (ECU) |
| 005016.06 | — | 12 Volt Supply High Main Control Module (CCU) | Full repair manual for code 005016.06 |
| 5016.06 | CCU (Chassis Control Unit) | 12 Volt Supply High AMPS | Full repair manual for code 5016.06, CCU (Chassis Control Unit) |
| 5018 | Engine Control Unit (ECU) | Calculated Unintended Combustibles in DOC Extremely High | Full repair manual for code 5018, Engine Control Unit (ECU) |
| 005018.00 | — | Possible Contamination In The DOC | Full repair manual for code 005018.00 |
| ECU005018.00 | ECU | Unexpected Temperature in Exhaust Filter | Full repair manual for code ECU005018.00, ECU |
| ECU005018.15 | ECU | Unexpected Temperature in Exhaust Filter | Full repair manual for code ECU005018.15, ECU |
| 5018.15 | Engine Control Unit (ECU) | The ECU Has Noted Possible Contamination In The DOC (ECU) | Full repair manual for code 5018.15, Engine Control Unit (ECU) |
| 005018.16 | — | Possible Contamination In The DOC | Full repair manual for code 005018.16 |
| ECU005018.16 | ECU | Unexpected Temperature in Exhaust Filter | Full repair manual for code ECU005018.16, ECU |
| 5018.16 | Engine Control Unit (ECU) | Calculated Unintended Combustibles in DOC Moderately High | Full repair manual for code 5018.16, Engine Control Unit (ECU) |
| 5125 | — | Sensor Supply #7 Voltage Fault | Full repair manual for code 5125 |
| 005125.03 | — | Sensor Supply Voltage Too High Manifold Air Pressure, Variable Fan Speed Sensor, EGR Flow Meter (ECU) | Full repair manual for code 005125.03 |
| 005125.03 | — | Sensor Supply Voltage Too High | Full repair manual for code 005125.03 |
| 5125.03 | ECU | Sensor Supply Voltage 7 Out of Range High | Full repair manual for code 5125.03, ECU |
| 5125.03 | Engine Control Unit (ECU) | Sensor Supply #7 Voltage Out of Range High | Full repair manual for code 5125.03, Engine Control Unit (ECU) |
| 5125.04 | ECU | Sensor Supply Voltage Too Low Manifold Air Pressure, Crank Case Pressure, EGR Flow Meter (ECU) | Full repair manual for code 5125.04, ECU |
| 5126 | — | Sensor Supply #8 Voltage Fault | Full repair manual for code 5126 |
| 005126.03 | — | Sensor Supply Voltage Too High | Full repair manual for code 005126.03 |
| 5126.03 | ECU | Sensor Supply Voltage 8 Out of Range High / Sensor Supply Voltage Too High, Exhaust Pressure Sensor, Engine Oil Pressure Sensor | Full repair manual for code 5126.03, ECU |
| 5126.03 | ECU (Engine Control Unit) | Sensor Supply #8 Voltage Out of Range High | Full repair manual for code 5126.03, ECU (Engine Control Unit) |
| 005126.04 | — | Sensor Supply Voltage Too Low | Full repair manual for code 005126.04 |
| 5126.04 | ECU | Sensor Supply #8 Voltage Out of Range Low | Full repair manual for code 5126.04, ECU |
| 5126.04 | Engine Control Unit (ECU) | Sensor Supply #8 Voltage Out of Range Low | Full repair manual for code 5126.04, Engine Control Unit (ECU) |
| 005127.03 | — | Sensor Supply Voltage Too High in DOC/DPF Temperature Module and SCR Temperature Module | Full repair manual for code 005127.03 |
| 005127.03 | — | Sensor Supply Voltage Too High | Full repair manual for code 005127.03 |
| 5127.03 | ECU | Sensor Supply #9 Voltage Out of Range High | Full repair manual for code 5127.03, ECU |
| 5127.03 | Engine Control Unit (ECU) | Sensor Supply #9 Voltage Out of Range High | Full repair manual for code 5127.03, Engine Control Unit (ECU) |
| 005127.04 | — | Sensor Supply Voltage Too Low in DOC/DPF Temperature Module and SCR Temperature Module | Full repair manual for code 005127.04 |
| 5127.04 | Engine Control Unit (ECU) | Sensor Supply #9 Voltage Out of Range Low | Full repair manual for code 5127.04, Engine Control Unit (ECU) |
| 005128.05 | — | Sensor Supply Low Amp Flow On The NOx Sensors Supply Circuit | Full repair manual for code 005128.05 |
| 5128.05 | ECU | Sensor Supply Voltage 10, Resistance Too High | Full repair manual for code 5128.05, ECU |
