7394 SPN Fault Code


Engine Fuel Isolation Control


Control setting for fuel isolation. In a single injector dual fuel system when using just diesel fuel, diesel must not be allowed to migrate into the gaseous fuel system. When the fuel isolation valve is closed the engine uses dual fuel by allowing the mechanical regulator controls the gaseous fuel to a pressure lower than the diesel fuel. When the fuel isolation valve is open the mechanical regulator does not see diesel fuel pressure so the gaseous fuel is off which prevents diesel fuel from migrating to the gaseous fuel system.00b = Gaseous Fuel Migration is Prevented 01b = Gaseous Fuel is Used 10b = Reserved 11b = Don�t care / take no action

7394 spn fault code name is Engine Fuel Isolation Control. If you don't take the time to look into 7394 spn fault when it arises, it can add up quickly. One small issue like 7394 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 7394 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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