Decode Your SPN:FMI Fault Code Now

What Does SPN Mean?

SPN refers to Suspect Parameter Numbers.

There are diagnostic fault codes referring to specific components or system circuits. Clue tracks over 3500 different SPN codes, used by Caterpillar equipment.

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What Does FMI Mean?

FMI refers to Failure Mode Identifier.

There are diagnostic fault codes indicating specific issues within a component or system circuit.

For example, MID 116-CID 854 may report FMI 4, “Voltage below normal.” Among the numerous fault codes at Clue, the most common FMIs are 3 (“Voltage above normal”) and 9 (“Abnormal update rate”). 

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With Clue, your operators, mechanics, and equipment managers get all fault codes translated into English (or Spanish).

Clue simplifies the process by interpreting SPN:FMI codes for you. To receive the complete list of codes, please fill out the form below. We're here to assist you.

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Complete SPN:FMI Fault Codes Table

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