7921 SPN Fault Code

Name:

SLI Battery Pack 1 Battery 3 Health

Description:

Capacity of the third battery in the first battery pack relative to its original specification for the battery pack used for starting the engine, for lighting, and for ignition (SLI). 0% means battery pack is not capable of holding any charge, 100% means battery pack is capable of holding its original full capacity.Parameter Specific Indicator: A value of FBh indicates conditions are not acceptable for a valid measurement.

7921 spn fault code name is SLI Battery Pack 1 Battery 3 Health. If you don't take the time to look into 7921 spn fault when it arises, it can add up quickly. One small issue like 7921 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 7921 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.

7921 SPN Fault Code

Name:

Description:

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