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11 May, 2025

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Cummins ISB4.5 CM2150 Fault Code: 3579 PID: SPN: 4376 FMI: 5 Aftertreatment Diesel Exhaust Fluid Return Valve – Current Below Normal or Open Circuit.

Circuit DescriptionThe aftertreatment diesel exhaust fluid return valve is controlled by the aftertreatment diesel exhaust fluid controller. The return valve...

11 May, 2025

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Cummins ISB4.5 CM2150 Fault Code: 358 PID: SID 254 SPN: 132 FMI: 2 Engine Intake Air Mass Flow Circuit – Data Erratic, Intermittent, or Incorrect.

Circuit DescriptionThe mass air flow sensor is a frequency based device. A constant voltage is applied to a heated wire....

11 May, 2025

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Cummins ISB4.5 CM2150 Fault Code: 3596 PID: SPN: 4334 FMI: 2 Aftertreatment Diesel Exhaust Fluid Pressure Sensor – Data Erratic, Intermittent, or Incorrect.

Circuit DescriptionThe diesel exhaust fluid controller provides a 5 volt supply and a ground to the diesel exhaust fluid pressure...

11 May, 2025

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Cummins ISB4.5 CM2150 Fault Code: 3597 PID: SID 254 SPN: 3360 FMI: 9 Aftertreatment Diesel Exhaust Fluid Controller – Abnormal Update Rate.

Circuit DescriptionThe aftertreatment diesel exhaust fluid controller communicates to the primary engine Electronic Control Module (ECM) through the J1939 public...

11 May, 2025

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Cummins ISB4.5 CM2150 Fault Code: 3598 PID: SPN: 3360 FMI: 19 Aftertreatment Diesel Exhaust Fluid Controller – Received Network Data In Error.

Circuit DescriptionThe aftertreatment diesel exhaust fluid controller is the central control for the aftertreatment diesel exhaust fluid dosing system, and...

11 May, 2025

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Cummins ISB4.5 CM2150 Fault Code: 3612 PID: SPN: 3361 FMI: 7 Aftertreatment Diesel Exhaust Fluid Dosing Unit – Mechanical System Not Responding or Out of Adjustment.

Circuit DescriptionThe diesel exhaust fluid dosing unit performs many functions, one of which is to generate adequate diesel exhaust fluid...

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