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17 August, 2025

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Cummins X15 CM2350 X116B Performance Series (2018 & Newer) Fault Code: 3741 PID: SPN: 5571 FMI: 0 High Pressure Common Rail Fuel Pressure Relief valve- Data Valid But Above Normal Operational Range- Most Severe Level

Circuit DescriptionThe high-pressure relief valve is a mechanical device that opens when the fuel pressure in the fuel rail exceeds...

17 August, 2025

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Cummins X15 CM2350 X116B Performance Series (2018 & Newer) Fault Code: 3748 PID: SPN: 3216 FMI: 20 Aftertreatment 1 Intake Nox Sensor- Data Not Rational- Drifted High

Circuit DescriptionThe aftertreatment intake NOx (nitrogen oxides) sensor is a smart device and communicates with the engine control module (ECM)...

17 August, 2025

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Cummins X15 CM2350 X116B Performance Series (2018 & Newer) Fault Code: 3749 PID: SID 254 SPN: 3226 FMI: 20 Aftertreatment Outlet Nox Sensor- Data Not Rational- Drifted High

Circuit DescriptionThe aftertreatment outlet NOx (nitrogen oxides) sensor is a smart device and communicates with the engine control module (ECM)...

17 August, 2025

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Cummins X15 CM2350 X116B Performance Series (2018 & Newer) Fault Code: 3843 PID: SPN: 5603 FMI: 9 Cruise Control Disable Command- Abnormal Update Rate

Circuit DescriptionNormally, switches, accelerators, and other components are connected to the engine control module (ECM) directly through individual wires. Multiplexing...

17 August, 2025

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Cummins X15 CM2350 X116B Performance Series (2018 & Newer) Fault Code: 3844 PID: SPN: 5605 FMI: 31 Cruise Control Disable Command- Condition Exists

Circuit DescriptionThe adaptive cruise control system sends commands to the ECM via the J1939 data link to limit engine speed...

17 August, 2025

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Cummins X15 CM2350 X116B Performance Series (2018 & Newer) Fault Code: 3845 PID: SPN: 5603 FMI: 31 Cruise Control Disable Command- Condition Exists

Circuit DescriptionThe adaptive cruise control system sends commands to the ECM via the J1939 data link to limit engine speed...

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