978 SPN Fault Code

Name:

Engine Remote PTO Governor Variable Speed Control Switch

Description:

Switch signal which indicates that the remote PTO governor toggle switch is in the enabled (ON) position. If the toggle switch is enabled and other conditions are satisfied then the remote PTO governor feature is activated and the PTO governor will control at a variable speed.00b = Off 01b = On 10b = Error 11b = Not available

978 spn fault code name is Engine Remote PTO Governor Variable Speed Control Switch. If you don't take the time to look into 978 spn fault when it arises, it can add up quickly. One small issue like 978 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 978 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.

978 SPN Fault Code

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