4401 SPN Fault Code


Aftertreatment 2 Diesel Exhaust Fluid Dosing Requested Quantity


Actual requested dosing quantity of diesel exhaust fluid.

4401 spn fault code name is Aftertreatment 2 Diesel Exhaust Fluid Dosing Requested Quantity. If you don't take the time to look into 4401 spn fault when it arises, it can add up quickly. One small issue like 4401 can cause a larger component to become damaged without taking the time to investigate. If you suspect your truck is suffering from one of these issues, look into replacing those small components to save money down the road.

Note: The name and description of 4401 code represents text descriptions for faults supported by another coding system and does not necessarily comply with SAE J1939. For a specific engine manufacturer's explanation for codes, please consult the engine's technical manual. See also other spn codes.

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SPNFMI Faults and Engine error code check tool. SPN code listing with names and descriptions.

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