3901 SPN Fault Code

Name:

Auxiliary I/O #78

Description:

Identifies the current status of auxiliary input/output functions that are configured uniquely per application.00b = Auxiliary channel off 01b = Auxiliary channel on 10b = Error Indicator or Not Used , depending on application 11b = Not Available or Take No Action, depending on application

3901 spn fault code name is Auxiliary I/O #78. If you don't take the time to look into 3901 spn fault when it arises, it can add up quickly. One small issue like 3901 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 3901 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.

3901 SPN Fault Code

Name:

Description:

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