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11 May, 2025

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Cummins ISB4.5 CM2150 Fault Code: 4739 PID: SPN: 1761 FMI: 11 Aftertreatment 1 Diesel Exhaust Fluid Tank Level Sensor – Root Cause Not Known.

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

11 May, 2025

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Cummins ISB4.5 CM2150 Fault Code: 4769 PID: SPN: 1761 FMI: 11 Aftertreatment 1 Diesel Exhaust Fluid Tank Level Sensor – Root Cause Not Known.

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

11 May, 2025

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Cummins ISB4.5 CM2150 Fault Code: 477 PID: 444 SPN: 444 FMI: 1 Battery 2 Voltage – Data Valid but Below Normal Operating Range – Moderately Severe Level.

Circuit DescriptionThe aftertreatment diesel exhaust fluid controller communicates with the ECM and controls the heating, dosing, and purging of the...

11 May, 2025

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Cummins ISB4.5 CM2150 Fault Code: 478 PID: 444 SPN: 444 FMI: 0 Battery 2 Voltage – Data Valid but Above Normal Operating Range – Moderately Severe Level.

Circuit DescriptionThe aftertreatment diesel exhaust fluid controller communicates with the ECM and controls the heating, dosing, and purging of the...

11 May, 2025

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Cummins ISB4.5 CM2150 Fault Code: 491 PID: SID 88 SPN: 1189 FMI: 3 Turbocharger 2 Wastegate Control Circuit – Voltage Above Normal or Shorted to High Source.

Circuit DescriptionThe wastegate actuators are devices used by the ECM to control boost pressure. Conditions for Running the DiagnosticsThis diagnostic...

11 May, 2025

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Cummins ISB4.5 CM2150 Fault Code: 492 PID: SID 88 SPN: 1189 FMI: 4 Turbocharger 2 Wastegate Control Circuit – Voltage below normal, or shorted to low source.

Circuit DescriptionThe wastegate actuators are devices used by the ECM to control boost pressure. Conditions for Running the DiagnosticsThis diagnostic...

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