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Cummins Fault Codes List: 4241 to 466

Page 12 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 4241 to 466

  • 4241Aftertreatment Diesel Exhaust Fluid Quality - Received Network Data in Error
  • 4242Aftertreatment 1 Diesel Exhaust Fluid Temperature 2 - Data Erratic, Intermittent, or Incorrect
  • 4243Aftertreatment 1 Diesel Exhaust Fluid Temperature 2 - Abnormal Rate of Change
  • 4244Aftertreatment Diesel Exhaust Fluid Dosing Temperature - Data erratic, intermittent or incorrect. The aftertreatment diesel exhaust fluid dosing temperature is irrational.
  • 4245Aftertreatment Diesel Exhaust Fluid Dosing Unit Heater Temperature - Data erratic, intermittent or incorrect. The aftertreatment diesel exhaust fluid dosing unit heater temperature is irrational.
  • 4249Aftertreatment Diesel Exhaust Fluid Dosing Temperature - Abnormal Rate of Change. The aftertreatment diesel exhaust fluid dosing unit temperature is stuck.
  • 425Engine Oil Temperature - Data Erratic, Intermittent, or Incorrect.
  • 4251Aftertreatment 1 Diesel Exhaust Fluid Dosing Unit Heater Temperature - Abnormal Rate of Change. The aftertreatment diesel exhaust fluid dosing unit heater temperature sensor reading is stuck.
  • 4252Engine Wait to Start Lamp - Condition Exists. The received signal does not match the commanded signal.
  • 4259Aftertreatment Diesel Particulate Filter Temperature Sensor Module - Root Cause Not Known. Intermittent battery voltage supply detected at the aftertreatment diesel particulate filter temperature sensor module.
  • 426SAE J1939 data link - cannot transmit. Communication between the ECM and another device on the SAE J1939 data link has been lost.
  • 4261Aftertreatment Selective Catalytic Reduction Temperature Sensor Module - Root Cause Not Known. Intermittent battery voltage supply detected at the aftertreatment SCR temperature sensor module.
  • 4262High Pressure Common Rail Fuel Pressure Relief Valve Circuit - Voltage Above Normal or Shorted to High Source
  • 4263High Pressure Common Rail Fuel Pressure Relief Valve Circuit - Voltage Below Normal or Shorted to Low Source
  • 4265High Pressure Common Rail Fuel Pressure Relief Valve - Root Cause Not Known
  • 427J1939 Datalink - Abnormal Update Rate. Communication between the electronic control module (ECM) and another device on the SAE J1939 data link has been lost.
  • 4277Aftertreatment Diesel Exhaust Fluid Quality - Abnormal Rate of Change. The Urea Quality Sensor has been unable to generate a concentration value for a period of time.
  • 4279Aftertreatment 1 SCR Intermediate NH3 - Data not Rational - Drifted Low. An in range low failure has been detected.
  • 428Water-in-Fuel Indicator Sensor Circuit - Voltage Above Normal or Shorted to High Source. High voltage detected at the water-in-fuel circuit.
  • 4281Aftertreatment SCR Intermediate NH3 - Data erratic, intermittent or incorrect. The aftertreatment SCR intermediate NH3 sensor reading is stuck.
  • 4282Aftertreatment Diesel Oxidation Catalyst Conversion Efficiency - Condition Exists. The temperature increase across the aftertreatment diesel oxidation catalyst is lower than expected.
  • 4284Desired Engine Fueling State - Abnormal Update Rate. A valid message from the transmission ECU has NOT been received.
  • 4289Accelerator Pedal or Lever Position Sensor 1 Circuit Frequency - Abnormal frequency or pulse width or period. The accelerator pedal position sensor reading is out of range.
  • 428 AUTOWater-in-Fuel Indicator Sensor Circuit - Voltage Above Normal or Shorted to High Source. High voltage detected at the water-in-fuel circuit.
  • 428 MARWater-in-Fuel Indicator Sensor Circuit - Voltage Above Normal or Shorted to High Source
  • 428 (Marine)Water-in-Fuel Indicator Sensor Circuit - Voltage Above Normal or Shorted to High Source. High voltage detected at the water-in-fuel circuit.
  • 429Water-in-Fuel Indicator Sensor Circuit - Voltage Below Normal or Shorted to Low Source. Low voltage detected at the water-in-fuel circuit.
  • 4293Engine Brake Active Lamp – Voltage Above Normal or Shorted to High Source
  • 4294Engine Brake Active Lamp – Voltage Below Normal or Shorted to Low Source
  • 429 AUTOWater-in-Fuel Indicator Sensor Circuit - Voltage Below Normal or Shorted to Low Source. Low voltage detected at the water-in-fuel circuit.
  • 429 MARWater-in-Fuel Indicator Sensor Circuit - Voltage Below Normal or Shorted to Low Source
  • 429 (Marine)Water-in-Fuel Indicator Sensor Circuit - Voltage Below Normal or Shorted to Low Source. Low voltage detected at the water-in-fuel circuit.
  • 431Accelerator Pedal or Lever Idle Validation Circuit - Data Erratic, Intermittent, or Incorrect. Voltage detected simultaneously on both idle validation and off-idle validation switches.
  • 431 (Integrated Sensor Switch)Accelerator Pedal or Lever Idle Validation Switch - Data Erratic, Intermittent, or Incorrect
  • 431 (ISS)Accelerator Pedal or Lever Idle Validation Circuit - Data Erratic, Intermittent, or Incorrect. Voltage detected simultaneously on both idle validation and off-idle validation switches.
  • 431 (IVS)Idle Validation Switch Circuit
  • 431 (NISS)Accelerator Pedal or Lever Idle Validation Circuit - Data Erratic, Intermittent, or Incorrect. Voltage detected simultaneously on both idle validation and off-idle validation switches.
  • 431 (Nonintegrated Sensor Switch)Accelerator Pedal or Lever Idle Validation Circuit - Data Erratic, Intermittent, or Incorrect
  • 431 (SSS)Accelerator Pedal or Lever Idle Validation Circuit - Data Erratic, Intermittent or Incorrect. Voltage detected simultaneously on both idle validation and off-idle validation switches.
  • 432No voltage detected at pin 26 of the original equipment manufacturer's (OEM) harness indicates the accelerator is at the idle position when the accelerator position signal at pin 30 of the OEM harness indicates the accelerator is not at the idle position or idle validation signal at pin 26 of the OEM harness indicates the accelerator is not at the idle position when the accelerator position signal pin 30 of the OEM harness indicates the accelerator is at the idle position.
  • 432 (ISS)Accelerator Pedal Circuit
  • 432 (IVS)Accelerator Pedal Circuit
  • 432(SSS)Accelerator Pedal Circuit
  • 433Boost pressure signal indicates boost pressure is high when other engine parameters (i.e., speed and load) indicate boost pressure can be low, or boost pressure is low when other engine parameters indicate it can be high.
  • 434Supply voltage to the electronic control module (ECM) fell below (+) 6.2 VDC for a fraction of a second, or the electronic control module (ECM) was not allowed to power down correctly (retain unswitched battery voltage for 30 seconds after key turned off).
  • 435Oil Pressure Switch Sensor Circuit - Data Erratic, Intermittent or Incorrect. An error in the engine oil pressure switch signal was detected by the ECM.
  • 435 (ISB)Engine Oil Rifle Pressure - Data Erratic, Intermittent, or Incorrect. An error in the engine oil pressure switch signal was detected by the ECM.
  • 435 (ISC/ISL)Engine Oil Rifle Pressure - Data Erratic, Intermittent, or Incorrect. The engine oil pressure sensor is reading an erratic value at key ON.
  • 435 (Sensor)Engine Oil Rifle Pressure - Data Erratic, Intermittent, or Incorrect
  • 435 (Switch)Engine Oil Rifle Pressure - Data Erratic, Intermittent, or Incorrect
  • 436Intake Manifold 1 Temperature - Data Erratic, Intermittent, or Incorrect. The intake manifold temperature sensor is reading an erratic value at initial key ON.
  • 441Voltage detected at electronic control module (ECM) power supply pins 38, 39, 40, and 50 of the engine harness indicates ECM supply voltage fell below (+) 6 VDC.
  • 441-ECM1Battery 1 Voltage - Data Valid but Below Normal Operational Range - Moderately Severe Level
  • 441-ECM2Battery 1 Voltage - Data Valid but Below Normal Operational Range - Moderately Severe Level
  • 442Voltage detected at electronic control module (ECM) power supply pins 38, 39, 40, and 50 of the engine harness indicates ECM supply voltage is above the maximum system voltage level.
  • 442-ECM1Battery 1 Voltage - Data Valid but Above Normal Operational Range - Moderately Severe Level
  • 442-ECM2Battery 1 Voltage High - Data Valid but Above Normal Operational Range - Moderately Severe Level
  • 443Accelerator Pedal or Lever Position Sensor Supply Voltage Circuit - Voltage Below Normal or Shorted to Low Source. Low voltage detected at sensor supply circuit to the accelerator pedal or lever position sensor.
  • 4431Aftertreatment Diesel Exhaust Fluid Controller - Out of Calibration
  • 4437J1939 Network #4 - Data Erratic, Intermittent, or Incorrect
  • 444Low voltage detected at remote accelerator position sensor supply pin 10 of the OEM harness.
  • 4449Aftertreatment 1 Particulate Sensor Regeneration Status - Data Valid But Above Normal Operating Range - Moderately Severe Level. The aftertreatment particulate matter sensor has detected in-range high sensor values.
  • 4452Aftertreatment Outlet NOx Sensor Closed Loop Operation - Condition Exists. The maximum dosing adjustment has been reached.
  • 4453Aftertreatment Intermediate NH3 Sensor Closed Loop Operation - Condition Exists. The maximum dosing adjustment has been reached.
  • 445BEngine Oil Rifle Pressure - Data Erratic, Intermittent, or Incorrect
  • 445CLEngine Oil Rifle Pressure - Data Erratic, Intermittent, or Incorrect
  • 4484Engine Air Shutoff Circuit - Mechanical System Not Responding or Out of Adjustment.
  • 449(ISC/QSC/ISL/QSL Automotive, Industrial, and Marine Applications) Injector Metering Rail Number 1 Pressure - Data Valid But Above Normal Operating Range - Most Severe Level
  • 449 (Auto)Injector Metering Rail Number 1 Pressure - Data Valid But Above Normal Operating Range - Most Severe Level. The ECM has detected that fuel pressure in the rail fuel is higher than the commanded pressure.
  • 449 BInjector Metering Rail Number 1 Pressure - Data Valid But Above Normal Operating Range - Most Severe Level
  • 449 CLInjector Metering Rail Number 1 Pressure - Data Valid But Above Normal Operating Range - Most Severe Level
  • 449 (ISB/QSB3.3)Injector Metering Rail Number 1 Pressure - Data Valid But Above Normal Operating Range - Most Severe Level. The ECM has detected that fuel pressure in the fuel rail is higher than the fuel pressure relief valve.
  • 449 (ISC - Auto)Injector Metering Rail Number 1 Pressure - Data Valid But Above Normal Operating Range - Most Severe Level. Fuel pressure signal indicates that fuel pressure has exceeded the maximum limit for the given engine rating.
  • 449 (ISC/ISL)Injector Metering Rail Number 1 Pressure - Data Valid But Above Normal Operating Range - Most Severe Level. The ECM has detected that fuel pressure in the fuel rail is higher than the fuel pressure relief valve.
  • 451Injector Metering Rail Number 1 Pressure Sensor Circuit - Voltage Above Normal or Shorted to High Source. High signal voltage detected at rail fuel pressure sensor circuit.
  • 4517Vehicle Identification Number - Out of Calibration. The vehicle identification number has not been programmed into the ECM.
  • 4518Aftertreatment SCR Intermediate Gas Temperature Sensor Circuit - Voltage above normal, or shorted to high source. High signal voltage detected at the aftreatment SCR intermediate temperature sensor circuit.
  • 4519Aftertreatment SCR Intermediate Gas Temperature Sensor Circuit - Voltage below normal, or shorted to low source. Low signal voltage detected at the aftertreatment SCR intermediate temperature sensor circuit.
  • 452Injector Metering Rail Number 1 Pressure Sensor Circuit - Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the rail fuel pressure sensor circuit.
  • 4521Aftertreatment SCR Intermediate Gas Temperature Sensor - Data erratic, intermittent or incorrect. The aftertreatment SCR intermediate temperature sensor reading is irrational.
  • 4524Aftertreatment SCR Intermediate Gas Temperature - Data valid but above normal operational range - Most Severe Level. The aftertreatment SCR intermediate temperature sensor reading is above the engine protection limit.
  • 4525Aftertreatment 1 SCR Intermediate Gas Temperature - Data Valid But Above Normal Operating Range - Moderately Severe Level. High SCR Intermediate temperature detected.
  • 4526Brake Pedal Position - Data erratic, intermittent or incorrect. The values of the 2 brake switch signals do not match.
  • 4533Aftertreatment 1 Diesel Oxidation Catalyst Outlet Gas Temperature - Voltage Above Normal or Shorted to High Source
  • 4534Aftertreatment 1 Diesel Oxidation Catalyst Outlet Gas Temperature - Voltage Below Normal or Shorted to Low Source
  • 455Electronic Fuel Injection Control Valve Circuit - Voltage Above Normal or Shorted to High Source
  • 456Fuel Pressure Sensor Circuit. Fuel pressure sensor stuck in range while engine is operating or fuel pressure sensor reading erratic in range.
  • 4568Aftertreatment Fuel Shutoff valve- Data Valid But Above Normal Operating Range- Moderately Severe Level
  • 4572Aftertreatment Diesel Exhaust Fluid Tank Temperature - Abnormal Update Rate. The ECM lost communication with the aftertreatment diesel exhaust fluid tank temperature sensor.
  • 4584Aftertreatment Diesel Particulate Filter System - Special Instructions. the incorrect aftertreatment diesel particulate filter system has been installed with the engine
  • 4585Aftertreatment 1 SCR Catalyst System - Special Instructions. The Incorrect SCR system has been Installed
  • 4587Aftertreatment 1 Diesel Exhaust Fluid Dosing Temperature - Data Valid But Above Normal Operating Range - Moderately Severe Level
  • 4612Engine Intake Manifold Pressure System Monitor - Condition Exists. The engine is unable to meet the air handling system commands.
  • 4615Engine Fuel Delivery Pressure - Data Valid But Above Normal Operating Range - Most Severe Level
  • 4616Intake Manifold 1 Pressure - Data Valid But Below Normal Operating Range - Least Severe Level
  • 4616 (HD)Intake Manifold 1 Pressure - Data Valid But Below Normal Operating Range - Least Severe Level
  • 4642Water-in-Fuel Indicator - Data Valid But Above Normal Operating Rage - Moderately Sever Level.
  • 465High voltage detected at the wastegate actuator number 1 circuit when no voltage was being supplied by the engine control module (ECM).
  • 4658Aftertreatment SCR Actual Dosing Reagent Quantity - Data Valid But Below Normal Operating Range - Moderately Severe Level. Low aftertreatment diesel exhaust fluid flow detected.
  • 466Less than (+) 6 VDC detected at the wastegate actuator number 1 circuit when on indicates an excessive current draw from the engine control module (ECM) or faulty ECM output circuit.
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