7788 SPN Fault Code

Name:

Transmission Shift Selector Requested Vehicle Direction

Description:

This parameter indicates the direction selected by the operator via the active transmission shift selector. Some regulations (e.g., Federal Motor Vehicle Safety Standards 102) require specific Engine Stop-Start behavior based on operator selected direction. This parameter provides the necessary direction information for this purpose. Neutral or range commands made by other vehicle functions (e.g., automatic neutral functions) will not be reflected in this parameter. For selectors that use momentary contacts, this parameter would not reflect the current state of the physical contacts, but rather the direction that the operator has selected. Where applicable, it conveys the transmission’s de-bounced interpretation of the selector inputs. 000b = No direction selected – Park 001b = No direction selected – Neutral 010b = Forward direction selected 011b = Reverse direction selected 100b to 101b = 4 SAE Reserved 110b = Error 111b = Not supported

7788 spn fault code name is Transmission Shift Selector Requested Vehicle Direction. If you don't take the time to look into 7788 spn fault when it arises, it can add up quickly. One small issue like 7788 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 7788 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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