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19 August, 2025

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Cummins X12 CM2350 X119B (2018 & Newer) Fault Code: 4726 PID: SPN: 1239 FMI: 16 Engine Fuel Leakage- Data Valid But Above Normal Operating Range- Moderately Severe Level

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: 4727 PID: SPN: 157 FMI: 15 Injector Metering rail 1 Pressure- Data Valid But Above Normal Operating Range- Least Severe Level

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: 4728 PID: SPN: 1209 FMI: 18 Exhaust Gas Pressure- Data Valid But Below Normal Operating Range- Moderately Severe Level

Circuit DescriptionThe engine control module (ECM) provides a 5 volt supply to the intake manifold pressure sensor on the sensor...

19 August, 2025

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Cummins X12 CM2350 X119B (2018 & Newer) Fault Code: 4731 PID: SPN: 3031 FMI: 13 Aftertreatment 1 Diesel Exhaust Fluid Tank Temperature Sensor- Out of Calibration

Circuit DescriptionThe aftertreatment diesel exhaust fluid tank temperature sensor is used to monitor the temperature of the aftertreatment diesel exhaust...

19 August, 2025

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Cummins X12 CM2350 X119B (2018 & Newer) Fault Code: 4732 PID: SPN: 1761 FMI: 13 Aftertreatment 1 Diesel Exhaust Fluid Tank Level Sensor- Out of Calibration

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: 4737 PID: SPN: 3031 FMI: 11 Aftertreatment 1 Diesel Exhaust Fluid Tank Temperature- Root Cause Not Known

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

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