J-1939 Fault Code Source Address (SA), Suspect Parameter Number (SPN), and Failure Mode Indicator (FMI) Descriptions This solution helps explain the underlying meaning of the numerical components which build a fault code.. Conditions to Set Fault Code Active FMI 12 - Bad Intelligent Device: The Transmission Requested Gear is invalid for the current operating conditions.
525 spn fault code name is Transmission Requested Gear. If you don't take the time to look into 525 spn fault when it arises, it can add up quickly. One small issue like 525 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.. Customer: I have a question about a different truck, it's still a 2022 kenworth T680 with an automatic transmission. The last 8 of the VIN is PJ230816. The issue with the truck is that it sometimes will not go into gear. The only active code pertaining to this is SPN 525 FMI 12. The description for that code says "bad intelligent device or component" Answered by Nich M. in 5 mins 4 months.
