3691 SPN Fault Code

Name:

Left Headlamp Dynamic Bending Light

Description:

This parameter indicates whether the dynamic bending light of the left headlamp is working properly. 000b = Dynamic bending light deactivated. There is no problem but for some reasons (e.g. daylight present) the bending light is deactivated. 001b = Dynamic bending light is working properly. Normal operation mode. Bending light is working properly. 010b = Dynamic bending light fail safe position. Bending light is damaged, current position does not affect oncoming traffic. 011b = Dynamic bending light failure. Bending light does not work, current position may affect oncoming traffic. 100b to 110b = Reserved 111b = Not available

3691 spn fault code name is Left Headlamp Dynamic Bending Light. If you don't take the time to look into 3691 spn fault when it arises, it can add up quickly. One small issue like 3691 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 3691 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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