986 SPN Fault Code

Name:

Engine Fan 1 Requested Percent Speed

Description:

Fan speed of the first or only fan in the system as a ratio of the actual fan drive (current speed) to the fully engaged fan drive (maximum fan speed). A two state fan (off/on) will use 0% and 100% respectively. A three state fan (off/intermediate/on) will use 0%, 50% and 100% respectively. A variable speed fan will use 0% to 100%. Multiple fan systems will use 0 to 100% to indicate the percent cooling capacity being provided. Feedback to this request is provided using the estimated fan speed (see SPN 975).Note that the intermediate fan speed of a three state fan will vary with different fan drives, therefore 50% is being used to indicate that the intermediate speed is required from the fan drive. Typically, the first fan in a system will be the fan closest to the radiator. The second fan will be located farthest from the radiator. See SPN 6730 for systems that have two fans.

986 spn fault code name is Engine Fan 1 Requested Percent Speed. If you don't take the time to look into 986 spn fault when it arises, it can add up quickly. One small issue like 986 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 986 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.

986 SPN Fault Code

Name:

Description:

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