8440 SPN Fault Code

Name:

Idle Control Request Activation

Description:

Indicates whether the idle speed request (SPN 8438) should be honored. This parameter does not inhibit or apply to Engine Operator Primary Intermediate Speed Select (SPN 2880).00b = Idle speed request is not active 01b = Idle speed request is active 10b = Error 11b = Not available

8440 spn fault code name is Idle Control Request Activation. If you don't take the time to look into 8440 spn fault when it arises, it can add up quickly. One small issue like 8440 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 8440 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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