7789 SPN Fault Code

Name:

Engine Fueling Desired Reason

Description:

This parameter conveys the reason a device wants the engine running. This SPN is intended to be used in conjunction with Desired Engine Fueling State (SPN 5793). When a device sends Desired Engine Fueling State = « Fueling Desired » either alone or in combination with Engine Start Request = « Start requested, automatic type », then SPN 7789 may be used to convey a reason for why the device desires the engine to run. If more than one reason exists at the same time, the reason with highest importance (as defined by the device sending this parameter) is indicated. 00h = Desired Engine Fueling State (SPN 5793) from this device does not equal 01b 01h = Lubrication distribution in device is incomplete 02h = Engine exhaust is needed as a heat source (i.e. regeneration) 03h = Engine coolant is needed as a heat source 04h = Engine is needed for cooling system operation 05h = Engine is needed for charging the SLI batteries 06h = Engine is needed for charging the hybrid stored energy source 07h =

7789 spn fault code name is Engine Fueling Desired Reason. If you don't take the time to look into 7789 spn fault when it arises, it can add up quickly. One small issue like 7789 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 7789 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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