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19 August, 2025

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Cummins X12 CM2350 X119B (2018 & Newer) Fault Code: 4768 PID: SPN: 3521 FMI: 11 Aftertreatment 1 Diesel Exhaust Fluid Property- Root Cause Not known

Circuit DescriptionThe DEF quality sensor is a smart device and communicates with the engine electronic control module (ECM) via the...

19 August, 2025

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Cummins X12 CM2350 X119B (2018 & Newer) Fault Code: 4769 PID: SPN: 1761 FMI: 10 Aftertreatment 1 Diesel Exhaust Fluid Tank Level Sensor- Abnormal Rate of Change

Circuit DescriptionThe aftertreatment diesel exhaust fluid tank level sensor is used to monitor the aftertreatment diesel exhaust fluid level inside...

19 August, 2025

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Cummins X12 CM2350 X119B (2018 & Newer) Fault Code: 483 PID: PID 129 SPN: 1349 FMI: 3 Injector Metering rail 2 Pressure Sensor Circuit- Voltage Above Normal, or Shorted to High Source

Circuit DescriptionThe engine control module (ECM) provides a 5 volt supply to the fuel rail pressure sensor using a dedicated...

19 August, 2025

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Cummins X12 CM2350 X119B (2018 & Newer) Fault Code: 4839 PID: SPN: 3667 FMI: 31 Engine Air Shutoff- Condition Exists

Circuit DescriptionThe engine control module (ECM) controls the engine intake air throttle actuator. The ECM can open and close the...

19 August, 2025

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Cummins X12 CM2350 X119B (2018 & Newer) Fault Code: 484 PID: PID 129 SPN: 1349 FMI: 4 Injector Metering Rail 2 Pressure Sensor Circuit- Voltage Below Normal, or Shorted to Low Source

Circuit DescriptionThe engine control module (ECM) provides a 5 volt supply to the fuel rail pressure sensor using a dedicated...

19 August, 2025

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Cummins X12 CM2350 X119B (2018 & Newer) Fault Code: 4842 PID: SPN: 3364 FMI: 15 Aftertreatment Diesel Exhaust Fluid Quality- Data Valid But Above Normal Operating Range- Least Severe Level

Circuit DescriptionThe aftertreatment diesel exhaust fluid quality sensor is a smart device that communicates to the ECM via the J1939...

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