Cummins Fault Codes List: 6499 to 6786
Page 16 of 19 of the full Cummins fault code list (1,847 codes). Each entry is the code as the machine reports it and what the manufacturer data says it means.
Cummins codes 6499 to 6786
- 6499ECU Power Output Supply Voltage 1 - Data Valid But Below Normal Operating Range - Least Severe Level
- 6511Maintain ECU Power Lamp Circuit - Voltage Above Normal or Shorted to High Source
- 6513Aftertreatment 1 Diesel Exhaust Fluid Dosing Unit 1 Heater - Data Valid But Below Normal Operating Range - Least Severe Level
- 6517Aftertreatment SCR Catalyst Conversion Efficiency - Data Valid But Below Normal Operating Range - Least Severe Level.
- 6521Aftertreatment 1 Outlet NOx Sensor Circuit - Voltage Below Normal or Shorted to Low Source
- 6522-2Coolant Level Sensor 1 Circuit - Voltage Above Normal or Shorted to High Source
- 6522 (2-Wire Sensor)Coolant Level Sensor 1 Circuit - Voltage Above Normal or Shorted to High Source
- 6522 (3-Wire Sensor)Coolant Level Sensor 1 Circuit - Voltage Above Normal or Shorted to High Source
- 6523-2Coolant Level Sensor 1 Circuit - Voltage Below Normal or Shorted to Low Source
- 6523 (2-Wire Sensor)Coolant Level Sensor 1 Circuit - Voltage Below Normal or Shorted to Low Source
- 6523-3Coolant Level Sensor 1 Circuit - Voltage Below Normal or Shorted to Low Source
- 6523 (3-Wire Sensor)Coolant Level Sensor 1 Circuit - Voltage Below Normal or Shorted to Low Source
- 6524Engine Oil Temperature Sensor 1 Circuit - Voltage Above Normal or Shorted to High Source
- 6525Engine Oil Temperature Sensor 1 Circuit - Voltage Below Normal or Shorted to Low Source
- 6526Aftertreatment Diesel Exhaust Fluid Tank Level Sensor - Out of Calibration. The received datalink message was not valid.
- 6527Aftertreatment Diesel Exhaust Fluid Return Valve - Mechanical System Not Responding or Out of Adjustment
- 6529Aftertreatment 1 Diesel Exhaust Fluid Dosing Unit Heater Relay Circuit - Voltage Above Normal or Shorted to High Source
- 6531Aftertreatment 1 Diesel Exhaust Fluid Line Heater 1 Circuit - Voltage Above Normal or Shorted to High Source
- 6532Aftertreatment 1 Diesel Exhaust Fluid Line Heater 1 Circuit - Voltage Below Normal or Shorted to Low Source
- 6533Aftertreatment 1 Diesel Exhaust Fluid Line Heater 2 Circuit - Voltage Above Normal or Shorted to High Source
- 6534Aftertreatment 1 Diesel Exhaust Fluid Line Heater 2 Circuit - Voltage Below Normal or Shorted to Low Source
- 6535Aftertreatment 1 Diesel Exhaust Fluid Line Heater 3 Circuit - Voltage Above Normal or Shorted to High Source
- 6536Aftertreatment 1 Diesel Exhaust Fluid Line Heater 3 Circuit - Voltage Below Normal or Shorted to Low Source
- 6539Aftertreatment 1 Diesel Oxidation Catalyst Intake Temperature - Data Erratic, Intermittent, or Incorrect
- 6551Aftertreatment 1 Diesel Particulate Filter Outlet Pressure Sensor Circuit - Voltage Above Normal or Shorted to High Source
- 6552Aftertreatment 1 Diesel Particulate Filter Outlet Pressure Sensor Circuit - Voltage Below Normal or Shorted to Low Source
- 6553Aftertreatment 1 Diesel Exhaust Fluid Line Heater 2 Circuit - Voltage Above Normal or Shorted to High Source
- 6556Engine Intake Air Heater 1 Circuit - Voltage Above Normal or Shorted to High Source
- 6557Engine Intake Air Heater 1 Circuit - Voltage Below Normal or Shorted to Low Source
- 6559Aftertreatment 1 Diesel Exhaust Fluid Tank Temperature Sensor Circuit - Voltage Below Normal or Shorted to Low Source
- 6562Aftertreatment 1 Diesel Exhaust Fluid Tank Level Sensor - Root Cause Not Known
- 6563PTO Governor State - Data Erratic, Intermittent, or Incorrect
- 6565Aftertreatment 1 Outlet NOx Sensor - Abnormal Rate of Change
- 6568Aftertreatment Regeneration Inhibit Switch - Data Erratic, Intermittent, or Incorrect
- 6569Aftertreatment 1 SCR Outlet Temperature Sensor Circuit - Voltage Above Normal or Shorted to High Source
- 6571Aftertreatment 1 SCR Outlet Temperature Sensor Circuit - Voltage Below Normal or Shorted to Low Source
- 6575Predictive Cruise Control State- Abnormal Update Rate
- 6581Aftertreatment 1 Outlet NOx Sensor Heater - Abnormal Rate of Change
- 6582Aftertreatment 1 Outlet NOx Sensor Power Supply - Data Erratic, Intermittent, or Incorrect
- 6583Auxiliary Temperature Sensor Input 1 - Special Instructions
- 6584Auxiliary Pressure Sensor Input 2 - Special Instructions
- 6595Engine Speed - Root Cause Not Known. The engine control module has detected the primary and backup speed sensor signals have lost synchronization or are connected backwards.
- 6596Diesel Particulate Filter Active Regeneration Inhibited Due to System Timeout - Condition Exists
- 6597SCR System Cleaning Inhibited Due to System Timeout - Condition Exists
- 6642Aftertreatment 1 Diesel Particulate Filter 1 Soot Sensor ECU Internal Temperature 1 Circuit- Voltage Below Normal or Shorted to Low Source. An internal circuit error has been detected by the aftertreatment particulate matter sensor.
- 6643Aftertreatment 1 Diesel Particulate Filter 1 Soot Sensor ECU Internal Temperature 1 Circuit- Voltage Above Normal or Shorted to High Source. An internal circuit error has been detected by the aftertreatment particulate matter sensor.
- 6644Aftertreatment 1 Diesel Particulate Filter 1 Soot Sensor ECU Internal Temperature 1 Circuit- Voltage Below Normal or Shorted to Low Source. An internal circuit error has been detected by the aftertreatment particulate matter sensor.
- 6645Aftertreatment 1 Diesel Particulate Filter 1 Soot Sensor ECU Internal Temperature 2 Circuit- Voltage Above Normal or Shorted to High Source. An internal circuit error has been detected by the aftertreatment particulate matter sensor.
- 6646Aftertreatment 1 Diesel Particulate Filter 1 Soot Sensor ECU Internal Temperature - Data Erratic, Intermittent, or Incorrect. Erratic internal temperatures have been detected by the aftertreatment particulate sensor.
- 6647Aftertreatment 1 Diesel Particulate Filter Soot Temperature Sensor - Voltage Above Normal or Shorted to High Source. An internal circuit error has been detected by the aftertreatment particulate matter sensor.
- 6648Aftertreatment 1 Diesel Particulate Filter Soot Temperature Sensor - Voltage Below Normal or Shorted to Low Source. An internal circuit error has been detected by the aftertreatment particulate matter sensor.
- 6649Aftertreatment 1 Diesel Particulate Filter Soot Temperature Sensor - Data Erratic, Intermittent, or Incorrect. The aftertreatment particulate matter sensor has detected a temperature that is incorrect for the conditions.
- 6651Aftertreatment 1 Diesel Particulate Filter Soot Sensor Module - Voltage Above Normal or Shorted to High Source. The aftertreatment particulate sensor has detected high supply voltage.
- 6652Aftertreatment 1 Diesel Particulate Filter Soot Sensor Module - Voltage Below Normal or Shorted to Low Source. The aftertreatment particulate sensor has detected low supply voltage.
- 6653Aftertreatment 1 Diesel Particulate Filter Soot Sensor Module - Current Above Normal or Grounded Circuit. The aftertreatment particulate sensor has detected high supply current.
- 6654Engine Exhaust Back Pressure Regulator - Mechanical System Not Responding or Out of Adjustment
- 6656SCR Monitoring System Malfunction - Condition Exists. Critical SCR related fault codes have been active and require immediate attention.
- 6688Aftertreatment 1 Particulate Sensor- Abnormal Update Rate
- 669Engine ECU Temperature - Data Erratic, Intermittent, or Incorrect
- 671Exhaust Temperature Senor Circuit - Left Bank Cylinder No. 1
- 672Exhaust Temperature Senor Circuit - Left Bank Cylinder No. 2
- 6721Aftertreatment 1 Diesel Particulate Filter 1 Soot Sensor ECU Internal Temperature - Data Valid But Above Normal Operating Range - Moderately Severe Level
- 6725Intake Manifold 1 Pressure- Data Valid But Above Normal Operating Range- Least Severe Level
- 6725HDIntake Manifold 1 Pressure- Data Valid But Above Normal Operating Range- Least Severe Level
- 673Exhaust Temperature Senor Circuit - Left Bank Cylinder No. 3
- 6735Aftertreatment 1 Diesel Particulate Filter 1 Soot Sensor ECU Internal Temperature- Data Valid But Above Normal Operating Range- Moderately Severe Level
- 6737Route Parameter Manager Module Software Malfunction - Bad Intelligent Device Or Component
- 6738Route Parameter Manager Module - Voltage Above Normal, Or Shorted To High Source
- 6739Route Parameter Manager Module - Voltage Below Normal, Or Shorted To Low Source
- 674Exhaust Temperature Senor Circuit - Left Bank Cylinder No. 4
- 6741Route Parameter Manager Module CAN 1 Malfunction - Special Instructions
- 6742Route Parameter Manager Module GPS Antenna Current - Condition Exists
- 6743Route Parameter Manager Module USB Malfunction - Root Cause Not Known
- 6744Route Parameter Manager Module - Out Of Calibration
- 6745Route Parameter Manager Module Map Loading Malfunction - Bad Intelligent Device Or Component
- 6746Route Parameter Manager Module Map Loading Malfunction - Condition Exists
- 6747Route Parameter Manager Module CAN 2 Malfunction - Special Instructions
- 6748Route Parameter Manager Module Hardware Malfunction - Condition Exists
- 6749Route Parameter Manager Module Flash Test Malfunction - Condition Exists
- 675Exhaust Temperature Senor Circuit - Left Bank Cylinder No. 5
- 6752Aftertreatment Diesel Exhaust Fluid Quality - Data Valid But Below Normal Operating Range - Moderately Severe Level
- 676Exhaust Temperature Senor Circuit - Left Bank Cylinder No. 6
- 6761Route Parameter Manager Module GPS Antenna - Current Above Normal or Grounded Circuit
- 6762Route Parameter Manager Module GPS Antenna - Abnormal Update Rate
- 6763Route Parameter Manager Module GPS Antenna - Current Below Normal or Open Circuit
- 6764Route Parameter Manager Module GPS Antenna Input Signal - Root Cause Not Known
- 6765Aftertreatment 1 Diesel Exhaust Fluid Property- Data Valid But Above Normal Operating Range- Moderately Severe Level
- 6766Aftertreatment 1 Diesel Exhaust Fluid Property- Data Valid But Below Normal Operating Range- Moderately Severe Level
- 677Exhaust Temperature Senor Circuit - Left Bank Cylinder No. 7
- 6771Aftertreatment System Assembly - Special Instructions
- 6772Engine Intake Air Mass Flow - Data Not Rational - Drifted High
- 6773Engine Intake Air Mass Flow - Data Not Rational - Drifted Low
- 6779Aftertreatment 1 Diesel Oxidation Catalyst Intake Temperature Sensor - Data Not Rational - Drifted High
- 678Exhaust Temperature Senor Circuit - Left Bank Cylinder No. 8
- 6781Aftertreatment 1 Diesel Oxidation Catalyst Intake Temperature Sensor - Data Not Rational - Drifted Low
- 6782Aftertreatment 1 Diesel Oxidation Catalyst Outlet Gas Temperature Sensor - Data Not Rational - Drifted High
- 6783Aftertreatment 1 Diesel Oxidation Catalyst Outlet Gas Temperature Sensor - Data Not Rational - Drifted Low
- 6784Aftertreatment 1 Diesel Particulate Filter Outlet Temperature Sensor - Data Not Rational - Drifted High
- 6785Aftertreatment 1 Diesel Particulate Filter Outlet Temperature Sensor - Data Not Rational - Drifted Low
- 6786Aftertreatment 1 Diesel Particulate Filter Outlet Pressure Sensor - Data Not Rational - Drifted High
Fault code lists by brand
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- Case IH2,992 codes
- Bobcat2,653 codes
- Challenger Tractor2,434 codes
- New Holland Combine2,274 codes
- John Deere Tractors1,884 codes
- Case Wheel Loader1,859 codes
- John Deere Engines1,853 codes
- Challenger Rubber Track Tractor1,747 codes
- Volvo Wheel Loader1,726 codes
- Deutz1,684 codes
Safety-critical: confirm before use
Safety first: park on level ground, stop the engine, and secure the machine before any inspection. Thresholds, component locations, wire numbers, fuse locations, and reset procedures can vary by model, configuration, and serial number. Confirm them in the service documentation for your exact machine.