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  1. #1
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    Help 2 Cummins isx fault codes defined

    Cummins ISX Codes:
    A complete list of all fault codes for Cummins ISX engines (2003 & later).


    Here are all the Cummins ISX codes available for the Cummins ECM. These Cummins trouble codes pertain to ISX engines built with the EGR system (2002 & later).

    Cummins ISX Codes 111-500
    111 Electronic Control Module Critical Internal Failure - Bad Intelligent Device or Component
    115 Engine Magnetic Speed/Position Lost Both of Two Signals - Data Erratic, Intermittent, or Incorrect
    122 Intake Manifold 1 Pressure Sensor Circuit - Voltage Above Normal, or Shorted to High Source
    123 Intake Manifold 1 Pressure Sensor Circuit - Voltage Below Normal, or Shorted to Low Source
    125 Intake Manifold 1 Pressure - Data Valid but Below Normal Operational Range - Moderately Severe Level
    131 Accelerator Pedal or Lever Position Sensor 1 Circuit - Voltage Above Normal, or Shorted to High Source
    132 Accelerator Pedal or Lever Position Sensor 1 Circuit - Voltage Below Normal or Shorted to Low Source
    133 Remote Accelerator Pedal or Lever Position Sensor 1 Circuit - Voltage Above Normal, or Shorted to High Source
    134 Remote Accelerator Pedal or Lever Position Sensor 1 Circuit - Voltage Below Normal, or Shorted to Low Source
    135 Engine Oil Rifle Pressure 1 Sensor Circuit - Voltage Above Normal, or Shorted to High Source
    141 Engine Oil Rifle Pressure 1 Sensor Circuit - Voltage Below Normal, or Shorted to Low Source
    143 Engine Oil Rifle Pressure - Data Valid but Below Normal Operational Range - Moderately Severe Level
    144 Engine Coolant Temperature 1 Sensor Circuit - Voltage Above Normal, or Shorted to High Source
    145 Engine Coolant Temperature 1 Sensor Circuit - Voltage Below Normal, or Shorted to Low Source
    146 Engine Coolant Temperature - Data Valid but Above Normal Operational Range - Moderately Severe Level
    151 Engine Coolant Temperature - Data Valid but Above Normal Operational Range - Most Severe Level
    153 Intake Manifold 1 Temperature Sensor Circuit - Voltage Above Normal, or Shorted to High Source
    154 Intake Manifold 1 Temperature Sensor Circuit - Voltage Below Normal, or Shorted to Low Source
    155 Intake Manifold 1 Temperature - Data Valid but Above Normal Operational Range - Most Severe Level
    187 Sensor Supply 2 Circuit Choice
    187ism Sensor Supply 2 Circuit - Voltage Below Normal, or Shorted to Low Source
    187isx Sensor Supply 2 Circuit - Voltage Below Normal, or Shorted to Low Source
    195 Coolant Level Sensor 1 Circuit Choice
    195-2wire Coolant Level Sensor 1 Circuit - Voltage Above Normal, or Shorted to High Source
    195-3wire Coolant Level Sensor 1 Circuit - Voltage Above Normal, or Shorted to High Source
    196 Coolant Level Sensor 1 Circuit Choice
    196-2wire Coolant Level Sensor 1 Circuit - Voltage Below Normal, or Shorted to Low Source
    196-3wire Coolant Level Sensor 1 Circuit - Voltage Below Normal, or Shorted to Low Source
    197 Coolant Level - Data Valid but Below Normal Operational Range - Moderately Severe Level
    212 Engine Oil Temperature Sensor 1 Circuit - Voltage Above Normal, or Shorted to High Source
    213 Engine Oil Temperature Sensor 1 Circuit — Voltage Below Normal, or Shorted to Low Source
    214 Engine Oil Temperature High - Data Valid but Above Normal Operational Range - Most Severe Level
    221 Barometric Pressure Sensor Circuit - Voltage Above Normal, or Shorted to High Source
    222 Barometric Pressure Sensor Circuit - Voltage Below Normal, or Shorted to Low Source
    227 Sensor Supply 2 Circuit - Voltage Above Normal, or Shorted to High Source
    234 Engine Crankshaft Speed/Position - Data Valid but Above Normal Operational Range - Most Severe Level
    238 Sensor Supply 3 Circuit - Voltage Below Normal, or Shorted to Low Source
    241 Wheel-Based Vehicle Speed - Data Erratic, Intermittent or Incorrect
    242 Wheel-Based Vehicle Speed Sensor Circuit Tampering Has Been Detected - Abnormal Rate of Change
    245 Fan Control Circuit - Voltage Below Normal or Shorted to Low Source
    249 Ambient Air Temperature Sensor 1 Circuit - Voltage Above Normal, or Shorted to High Source
    254 Engine Fuel Shutoff Valve Driver Circuit - Voltage Below Normal, or Shorted to Low Source
    255 Engine Fuel Shutoff Valve Driver Circuit - Voltage Above Normal, or Shorted to High Source
    256 Ambient Air Temperature Sensor 1 Circuit - Voltage Below Normal, or Shorted to Low Source
    257 Engine Fuel shutoff Valve Driver - Mechanical System Not Responding Properly or Out of Adjustment
    263 Engine Fuel Temperature Sensor 1 Circuit - Voltage Above Normal, or Shorted to High Source
    265 Engine Fuel Temperature Sensor 1 Circuit - Voltage Below Normal, or Shorted to Low Source
    285 SAE J1939 Multiplexing PGN Timeout Error - Abnormal Update Rate
    286 SAE J1939 Multiplexing Configuration Error - Out of Calibration
    287 SAE J1939 Multiplexed Accelerator Pedal or Lever Sensor System - Received Network Data In Error
    288 SAE J1939 Multiplexing Remote Accelerator Pedal or Lever Position Sensor System - Received Network Data In Error
    295 Barometric Pressure - Data Erratic, Intermittent, or Incorrect
    311 Injector Solenoid Driver Cylinder 1 Circuit - Current Above Normal, or Grounded Circuit
    312 Injector Solenoid Driver Cylinder 5 Circuit - Current Above Normal, or Grounded Circuit
    313 Injector Solenoid Driver Cylinder 3 Circuit - Current Above Normal, or Grounded Circuit
    314 Injector Solenoid Driver Cylinder 6 Circuit - Current Above Normal, or Grounded Circuit
    315 Injector Solenoid Driver Cylinder 2 Circuit - Current Above Normal, or Grounded Circuit
    319 Real Time Clock Power Interrupt - Data Erratic, Intermittent, or Incorrect
    321 Injector Solenoid Driver Cylinder 4 Circuit - Current Above Normal, or Grounded Circuit
    322 Injector Solenoid Driver Cylinder 1 Circuit - Current Below Normal, or Open Circuit
    323 Injector Solenoid Driver Cylinder 5 Circuit - Current Below Normal, or Open Circuit
    324 Injector Solenoid Driver Cylinder 3 Circuit - Current Below Normal, or Open Circuit
    325 Injector Solenoid Driver Cylinder 6 Circuit - Current Below Normal, or Open Circuit
    331 Injector Solenoid Driver Cylinder 2 Circuit - Current Below Normal, or Open Circuit
    332 Injector Solenoid Driver Cylinder 4 Circuit - Current Below Normal, or Open Circuit
    338 Idle Shutdown Vehicle Accessories Relay Driver Circuit - Voltage Above Normal, or Shorted to High Source
    339 Idle Shutdown Vehicle Accessories Relay Driver Circuit - Voltage Below Normal, or Shorted to Low Source
    343 Engine Control Module Warning Internal Hardware Failure - Bad Intelligent Device or Component
    346 Engine Control Module Calibration Memory Software - Bad Intelligent Device or Component
    351 Injector Power Supply - Bad Intelligent Device or Component
    352 Sensor Supply 1 Circuit - Voltage Below Normal, or Shorted to Low Source
    386 Sensor Supply 1 Circuit - Voltage Above Normal, or Shorted to High Source
    415 Engine Oil Rifle Pressure - Data Valid but Below Normal Operational Range - Most Severe Level
    418 Water in Fuel Indicator - Data Valid but Above Normal Operational Range - Least Severe Level
    427 SAE J1939 Datalink - Abnormal Update Rate
    428 Water-in-Fuel Indicator Sensor Circuit - Voltage Above Normal, or Shorted to High Source
    429 Water-in-Fuel Indicator Sensor Circuit - Voltage Below Normal, or Shorted to Low Source
    435 Engine Oil Rifle Pressure - Data Erratic, Intermittent, or Incorrect
    441 Battery 1 Voltage - Data Valid but Below Normal Operational Range - Moderately Severe Level
    442 Battery 1 Voltage - Data Valid but Above Normal Operational Range - Moderately Severe Level

    Cummins ISX Codes 500-1000
    546 Fuel Delivery Pressure Sensor Circuit - Voltage Above Normal, or Shorted to High Source
    547 Fuel Delivery Pressure Sensor Circuit - Voltage Below Normal, or Shorted to Low Source
    555 Crankcase Pressure - Data Valid but Above Normal Operational Range - Moderately Severe Level
    556 Crankcase Pressure — Data Valid but Above Normal Operational Range — Most Severe Level
    584 Starter Relay Driver Circuit - Voltage Above Normal, or Shorted to High Source
    585 Starter Relay Driver Circuit - Voltage Below Normal, or Shorted to Low Source
    596 Electrical Charging System Voltage - Data Valid but Above Normal Operational Range - Moderately Severe Level
    597 Electrical Charging System Voltage - Data Valid but Below Normal Operational Range - Moderately Severe Level
    598 Electrical Charging System Voltage - Data Valid but Below Normal Operational Range - Most Severe Level
    649 Engine Oil Change Interval - Condition Exists
    686 Turbocharger 1 Speed - Data Erratic, Intermittent, or Incorrect
    687 Turbocharger 1 Speed - Data Valid but Below Normal Operational Range - Moderately Severe Level
    689 Engine Crankshaft Speed/Position - Data Erratic, Intermittent, or Incorrect
    689ism Engine Crankshaft Speed/Position - Data Erratic, Intermittent, or Incorrect
    689isx Engine Crankshaft Speed/Position - Data Erratic, Intermittent, or Incorrect
    691 Turbocharger 1 Compressor Inlet Temperature Sensor Circuit - Voltage Above Normal, or Shorted to High Source
    692 Turbocharger 1 Compressor Inlet Temperature Sensor Circuit - Voltage Below Normal, or Shorted to Low Source
    697 ECM Internal Temperature Sensor Circuit - Voltage Above Normal, or Shorted to High Source
    698 ECM Internal Temperature Sensor Circuit - Voltage Below Normal, or Shorted to Low Source
    731 Engine Speed / Position Camshaft and Crankshaft Misalignment - Mechanical System Not Responding Properly or Out of Adjustment
    778 Engine Camshaft Speed/Position Sensor Choice
    778ism Engine Camshaft Speed/Position Sensor - Data Erratic, Intermittent, or Incorrect
    778isx Engine Camshaft Speed/Position Sensor - Data Erratic, Intermittent, or Incorrect
    784 Adaptive Cruise Control Mode - Data Erratic, Intermittent, or Incorrect



    Cummins ISX Codes 1000-1300
    1117 Power Supply Lost With Ignition On - Data Erratic, Intermittent, or Incorrect
    1239 Accelerator Pedal or Lever Position Sensor 2 Circuit - Voltage Above Normal, or Shorted to High Source
    1241 Accelerator Pedal or Lever Position Sensor 2 Circuit - Voltage Below Normal, or Shorted to Low Source
    1242 Accelerator Pedal or Lever Position Sensor 1 and 2 - Data Erratic, Intermittent, or Incorrect

    Cummins ISX Codes 1300-1700
    1663 Catalyst Inlet Temperature Sensor Swapped with Outlet - Condition Exists
    1664 Catalyst Missing - Condition Exists
    1665 Aftertreatment Exhaust Gas Temperature 1 Circuit - Voltage Below Normal, or Shorted to Low Source
    1666 Aftertreatment Exhaust Gas Temperature 1 Circuit - Voltage Above Normal, or Shorted to High Source
    1667 Aftertreatment Exhaust Gas Temperature 1 - Data Erratic, Intermittent, or Incorrect
    1674 Aftertreatment Exhaust Gas Temperature 2 Circuit - Voltage Below Normal, or Shorted to Low Source
    1675 Aftertreatment Exhaust Gas Temperature 2 Circuit - Voltage Above Normal, or Shorted to High Source
    1676 Aftertreatment Exhaust Gas Temperature 2 - Data Erratic, Intermittent, or Incorrect
    1691 Catalyst Efficiency - Out of Calibration
    1695 Sensor Supply 5 - Voltage Above Normal, or Shorted to High Source
    1696 Sensor Supply 5 - Voltage Below Normal, or Shorted to Low Source

    Cummins ISX Codes 1700-1900
    1843 Crankcase Pressure Circuit - Voltage Above Normal, or Shorted to High Source
    1844 Crankcase Pressure Circuit - Voltage Below Normal, or Shorted to Low Source
    1866 Exhaust Gas Recirculation Valve Delta Pressure - Data Erratic, Intermittent, or Incorrect
    1876 Aftertreatment Exhaust Gas Temperature 3 Circuit - Voltage Above Normal, or Shorted to High Source
    1877 Aftertreatment Exhaust Gas Temperature 3 Circuit - Voltage Below Normal, or Shorted to Low Source
    1878 Aftertreatment Exhaust Gas Temperature 3 - Data Erratic, Intermittent, or Incorrect
    1879 Aftertreatment Particulate Filter Differential Pressure Sensor Circuit - Voltage Above Normal, or Shorted to High Source
    1881 Aftertreatment Particulate Filter Differential Pressure Sensor Circuit - Voltage Below Normal, or Shorted to Low Source
    1883 Aftertreatment Particulate Filter Differential Pressure Sensor - Data Erratic, Intermittent, or Incorrect
    1893 EGR Valve Control Circuit - Abnormal Update Rate
    1895 EGR Valve Controller - Bad Intelligent Device or Component
    1896 EGR Valve Controller - Out of Calibration
    1899 Exhaust Gas Recirculation Valve Delta Pressure - Data Valid but Above Normal Operational Range- Moderately Severe Level

    Cummins ISX Codes 1900-2000
    1921 Aftertreatment Particulate Filter Differential Pressure - Data Valid but Above Normal Operational Range - Moderately Severe Level
    1922 Aftertreatment Particulate Filter Differential Pressure - Data Valid but Above Normal Operational Range - Most Severe Level
    1923 Aftertreatment Fuel shutoff Valve 1 Circuit - Voltage Above Normal, or Shorted to High Source
    1924 Aftertreatment Fuel Shutoff Valve 1 Circuit - Voltage Below Normal, or Shorted to Low Source
    1925 Aftertreatment Fuel Shutoff Valve 1 - Data Erratic, Intermittent, or Incorrect
    1926 Aftertreatment Fuel Pressure Sensor - Data Erratic, Intermittent, or Incorrect
    1927 Aftertreatment Fuel Pressure Sensor - Voltage Above Normal, or Shorted to High Source
    1928 Aftertreatment Fuel Pressure Sensor - Voltage Below Normal, or Shorted to Low Source
    1932 Aftertreatment Fuel Injector 1 - Data Erratic, Intermittent, or Incorrect
    1933 ECU Power Output Supply Voltage 2 - Data Valid but Above Normal Operational Range - Moderately Severe Level
    1934 ECU Power Output Supply Voltage 2 - Data Valid but Below Normal Operational Range - Moderately Severe Level
    1935 EGR Actuator Driver Circuit - Root Cause Not Known
    1938 ECU Power Output Supply Voltage 1 - Data Valid but Below Normal Operational Range - Moderately Severe Level
    1942 Crankcase Pressure - Data Erratic, Intermittent, or Incorrect
    1943 Ambient Air Density - Data Valid but Below Normal Operational Range - Least Severe Level
    1961 EGR Valve Control Circuit Calculated Over Temperature - Data Valid but Above Normal Operational Range - Least Severe Level
    1962 VGT Actuator Driver Over Temperature (Calculated - Data Valid but Above Normal Operational Range - Least Severe Level
    1963 Aftertreatment Fuel Shutoff Valve 1 - Mechanical System Not Responding Properly or Out of Adjustment
    1966 Aftertreatment Exhaust Gas Temperature 1 - Data Valid but Above Normal Operational Range - Most Severe Level
    1968 Aftertreatment Exhaust Gas Temperature 2 - Data Valid but Above Normal Operational Range - Moderately Severe Level
    1969 Aftertreatment Exhaust Gas Temperature 2 - Data Valid but Above Normal Operational Range - Most Severe Level
    1972 Aftertreatment Exhaust Gas Temperature 3 - Data Valid but Above Normal Operational Range - Moderately Severe Level
    1973 Aftertreatment Exhaust Gas Temperature 3 - Data Valid but Above Normal Operational Range - Most Severe Level
    1974 Crankcase Pressure - Data Valid but Above Normal Operational Range - Least Severe Level
    1977 Aftertreatment Fuel Injector 1 Circuit - Current Below Normal, or Open Circuit
    1981 Aftertreatment Particulate Filter Differential Pressure - Data Valid but Above Normal Operational Range - Least Severe Level
    1993 Aftertreatment Particulate Filter Missing - Condition Exists

    Cummins ISX Codes 2000-2200
    2182 Engine Brake Actuator Driver 1 Circuit - Voltage Above Normal, or Shorted to High Source
    2183 Engine Brake Actuator Driver 1 Circuit - Voltage Below Normal, or Shorted to Low Source
    2185 Sensor Supply 4 Circuit — Voltage Above Normal, or Shorted to High Source
    2186 Sensor Supply 4 Circuit - Voltage Below Normal, or Shorted to Low Source
    2195 Auxiliary Equipment Sensor Input 3 Engine Protection Critical - Special Instructions
    2198 VGT Actuator Driver Circuit - Root Cause Not Known

    Cummins ISX Codes 2200-2400
    2215 Fuel Pump Delivery Pressure — Data Valid but Below Normal Operational Range — Moderately Severe Level
    2216 Fuel Pump Delivery Pressure - Data Valid but Above Normal Operational Range - Moderately Severe Level
    2272 EGR Valve Position Circuit - Voltage Below Normal, or Shorted to Low Source
    2273 Exhaust Gas Recirculation Valve Delta Pressure Sensor Circuit - Voltage Above Normal, or Shorted to High Source
    2274 Exhaust Gas Recirculation Valve Delta Pressure Sensor Circuit - Voltage Below Normal, or Shorted to Low Source
    2288 Turbocharger 1 Speed - Data Valid but Above Normal Operational Range - Least Severe Level
    2311 Electronic Fuel Injection Control Valve Circuit — Condition Exists
    2312 Timing Actuator Driver Circuit - Condition Exists
    2313 Fuel Control Valve Solenoid Driver 2 Circuit - Condition Exists
    2314 Engine Timing Actuator Driver 2 Circuit Error - Condition Exists
    2321 Engine Crankshaft Speed/Position — Data Erratic, Intermittent, or Incorrect
    2322 Engine Camshaft Speed/Position Sensor — Data Erratic, Intermittent, or Incorrect
    2345 Turbocharger 1 Speed - Abnormal Rate of Change
    2346 Turbocharger Turbine Inlet Temperature (Calculated - Data Valid but Above Normal Operational Range - Least Severe Level
    2347 Turbocharger Compressor Outlet Temperature (Calculated - Data Valid but Above Normal Operational Range - Least Severe Level
    2349 EGR Valve Control Circuit - Current Below Normal, or Open Circuit
    2351 EGR Valve Control Circuit - Voltage Below Normal, or Shorted to Low Source
    2357 EGR Valve Control Circuit - Mechanical System Not Responding Properly or Out of Adjustment
    2359 Exhaust Gas Recirculation Valve Delta Pressure - Data Valid but Above Normal Operational Range - Moderately Severe Level
    2363 Engine Brake Actuator Driver Output 2 Circuit Choice
    2363ism Engine Brake Actuator Driver Output 2 Circuit - Voltage Below Normal, or Shorted to Low Source
    2363isx Engine Brake Actuator Driver Output 2 Circuit - Voltage Below Normal, or Shorted to Low Source
    2365 Engine Brake Actuator Driver Output 3 Circuit - Voltage Below Normal, or Shorted to Low Source
    2367 Engine Brake Actuator Driver Output 2 Circuit Choice
    2367ism Engine Brake Actuator Driver Output 2 Circuit - Voltage Above Normal, or Shorted to High Source
    2367isx Engine Brake Actuator Driver Output 2 Circuit - Voltage Above Normal, or Shorted to High Source
    2368 Engine Brake Actuator Driver Output 3 Circuit - Voltage Above Normal, or Shorted to High Source
    2372 Fuel Filter Differential Pressure - Data Valid but Above Normal Operational Range - Moderately Severe Level
    2373 Exhaust Gas Pressure Sensor Circuit - Voltage Above Normal, or Shorted to High Source
    2374 Exhaust Gas Pressure Sensor Circuit - Voltage Below Normal, or Shorted to Low Source
    2375 Exhaust Gas Recirculation Temperature Sensor Circuit - Voltage Above Normal, or Shorted to High Source
    2376 Exhaust Gas Recirculation Temperature Sensor Circuit - Voltage Below Normal, or Shorted to Low Source
    2377 Fan Control Circuit — Voltage Above Normal, or Shorted to High Source
    2387 VGT Actuator Driver Circuit (Motor - Mechanical System Not Responding Properly, or Out of Adjustment

    Cummins ISX Codes 2400-2600
    2412 Fan Speed - Data Erratic, Intermittent, or Incorrect
    2448 Coolant Level - Data Valid but Below Normal Operational Range - Least Severe Level
    2449 VGT Actuator Controller - Out of Calibration
    2451 Turbocharger Turbine Inlet Temperature (Calculated - Data Valid but Above Normal Operational Range - Moderately Severe Level
    2551 Injector Metering Rail 2 Pressure - Data Valid but Above Normal Operational Range - Moderately Severe Level
    2552 Injector Metering Rail 1 Pressure - Data Valid but Above Normal Operational Range - Moderately Severe Level
    2554 Exhaust Gas Pressure - Data Erratic, Intermittent, or Incorrect

    Cummins ISX Codes 2600-2800
    2634 VGT Actuator Controller - Bad Intelligent Device or Component
    2635 VGT Actuator Driver Circuit - Condition Exists
    2636 VGT Actuator Driver Circuit - Abnormal Update Rate
    2637 Catalyst Face Plugged - Root Cause Not Known
    2638 Catalyst Efficiency - Out of Calibration
    2639 Aftertreatment Particulate Filter Differential Pressure - Data Valid but Above Normal Operational Range - Least Severe Level
    2646 Engine Coolant Temperature - Condition Exists
    2659 Engine Coolant Temperature - Condition Exists
    2728 Aftertreatment Fuel Injector 1 - Data Valid but Above Normal Operational Range - Moderately Severe Level
    2732 Aftertreatment Fuel Drain Valve Circuit - Voltage Above Normal or Shorted to High Source
    2733 Aftertreatment Fuel Drain Valve Circuit - Voltage Below Normal or Shorted to Low Source
    2738 Start Enable Device 1 Circuit (Ether Injection - Voltage Above Normal or Shorted to High Source
    2739 Start Enable Device 1 Circuit (Ether Injection - Voltage Below Normal or Shorted to Low Source
    2741 Aftertreatment Fuel Shutoff Valve 1 Swapped - Condition Exists
    2742 Aftertreatment Exhaust Gas Temperature 2 - Data Valid but Below Normal Operational Range - Least Severe Level
    2743 Aftertreatment Exhaust Gas Temperature 2 - Data Valid but Below Normal Operational Range - Moderately Severe Level
    2754 Engine Particulate Filter Inlet Pressure - Data Valid but Above Normal Operational Range - Moderately Severe Level
    2764 Exhaust Gas Pressure - Data Valid but Above Normal Operational Range - Moderately Severe Level
    2774 Engine Exhaust Gas Recirculation (EGR System - Condition Exists
    2777 Particulate Trap Active Regeneration Inhibited Due to Inhibit Switch - Condition Exists
    2789 Engine Coolant Temperature - Data Valid but Below Normal Operational Range - Moderately Severe Level

    Cummins ISX Codes 2800-3000
    2813 EGR Valve Control - Special Instructions
    2878 Aftertreatment Fuel Drain Valve - Mechanical System Not Responding Properly or Out of Adjustment
    2879 Aftertreatment Fuel Drain Valve - Data Erratic, Intermittent, or Incorrect
    2881 Aftertreatment Fuel Pressure Sensor - Data Valid but Below Normal Operational Range - Least Severe Level
    2961 Exhaust Gas Recirculation Temperature - Data Valid but Above Normal Operational Range - Least Severe Level
    2962 Exhaust Gas Recirculation Temperature - Data Valid but Above Normal Operational Range - Moderately Severe Level
    2963 Engine Coolant Temperature — Data Valid but Above Normal Operational Range — Least Severe Level
    2964 Intake Manifold 1 Temperature — Data Valid but Above Normal Operational Range — Least Severe Level
    2973 Intake Manifold 1 Pressure - Data Erratic, Intermittent, or Incorrect


    For Cummins ISX fault codes on earlier models (before 2002), use Cummins ISX Codes (before 2002).

    Source:http://www.diesel-service-parts.com/...isx-codes.html

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  3. #2
    Road Train Member VisionLogistics's Avatar
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    For the new drivers, these codes correspond with the red engine light that flashes when you turn the key on. Usually, you turn on the ignition and the instrument panel will flash and beep the codes with a slight pause between each number. Simply count the beeps/flashes, and write down the number each time. When the sequence is done the check engine light usually comes on (unless it's serious and the red engine light stays on).

    Print the original post and put it in your drivers permit book or something so they have a reference for basic troubleshooting.
    Last edited by VisionLogistics; 03.28.2012 at 12.40 PM.

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  5. #3
    EHB
    EHB is offline
    Light Load Member EHB's Avatar
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    That's why I rather a CAT....LOL

  6. #4
    Bobtail Member
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    Quote Originally Posted by EHB View Post
    That's why I rather a CAT....LOL
    Good luck with that in a new truck.

  7. #5
    Bobtail Member sergeo'shemi's Avatar
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    thanks for this information