2391 SPN Fault Code


Back Up Light and Alarm Horn Command


Command to activate or de-activate the back up lights and/ or associated alarm if required 00b = De-activate 01b = Activate 10b = Reserved 11b = Don�t Care

2391 spn fault code name is Back Up Light and Alarm Horn Command. If you don't take the time to look into 2391 spn fault when it arises, it can add up quickly. One small issue like 2391 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 2391 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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