4040 SPN Fault Code

Name:

Snow Plow Lighting Mode Switch

Description:

The snow plow lighting mode switch directs that the forward illumination switch to snow plow mode from normal mode. This switch turns on lamps that are mounted above a snow plow blade to provide forward illumination that would otherwise be blocked by a snow plow blade mounted on a front frame extension.

4040 spn fault code name is Snow Plow Lighting Mode Switch. If you don't take the time to look into 4040 spn fault when it arises, it can add up quickly. One small issue like 4040 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 4040 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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