8121 SPN Fault Code

Name:

HVES1 State of Health

Description:

This signal represents the expected remaining « Life » of the High Voltage Energy Storage 1 pack (or system), in percent. Battery life is a manufacturer-specific measure of how well the energy storage system is functioning relative to its nominal (rated) and end (failed) states. This value should begin at 100%, and end at 0% when “no” energy is able to be put in or taken out. “No” could be absolute zero, or it could be some rated value of the pack.The pack supplier can develop their own algorithm to calculate this parameter, but in general it is a reverse Amp Hour Counter, reflecting the expected Amp Hours of energy throughput remaining in the Hybrid Battery.

8121 spn fault code name is HVES1 State of Health. If you don't take the time to look into 8121 spn fault when it arises, it can add up quickly. One small issue like 8121 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 8121 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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