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SPN FMI Fault Codes Explained – What Diesel Technicians Need to Know

SPN FMI Fault Codes Explained – What Diesel Tec...

If you're working on a diesel truck and see codes like SPN 5246 FMI 0 or SPN 3251 FMI 1, understanding what these numbers mean is key to fixing the...

SPN FMI Fault Codes Explained – What Diesel Tec...

If you're working on a diesel truck and see codes like SPN 5246 FMI 0 or SPN 3251 FMI 1, understanding what these numbers mean is key to fixing the...

Cummins Fault Code 3712 – How to Clear SCR System Derate (SPN 5246 FMI 0)

Cummins Fault Code 3712 – How to Clear SCR Syst...

Cummins Fault Code 3712 means your engine is under a derate condition due to aftertreatment system issues, specifically in the Selective Catalytic Reduction (SCR) system. This code is often paired...

Cummins Fault Code 3712 – How to Clear SCR Syst...

Cummins Fault Code 3712 means your engine is under a derate condition due to aftertreatment system issues, specifically in the Selective Catalytic Reduction (SCR) system. This code is often paired...

Cummins Fault Code 3255 – DPF Outlet Temperature Sensor High (SPN 3246 FMI 0 or 16)

Cummins Fault Code 3255 – DPF Outlet Temperatur...

Fault Code 3255 (SPN 3246 FMI 0 or 16) indicates that your DPF outlet temperature sensor is reporting dangerously high readings. If ignored, this can lead to aftertreatment damage or forced derate....

Cummins Fault Code 3255 – DPF Outlet Temperatur...

Fault Code 3255 (SPN 3246 FMI 0 or 16) indicates that your DPF outlet temperature sensor is reporting dangerously high readings. If ignored, this can lead to aftertreatment damage or forced derate....

How to Diagnose a Diesel Fault Code in 3 Easy Steps (Fast & Accurate)

How to Diagnose a Diesel Fault Code in 3 Easy S...

When a fault code shows up on your diesel truck, it can feel overwhelming. Whether it’s a check engine light, MIL alert, or a full-blown derate, knowing how to quickly...

How to Diagnose a Diesel Fault Code in 3 Easy S...

When a fault code shows up on your diesel truck, it can feel overwhelming. Whether it’s a check engine light, MIL alert, or a full-blown derate, knowing how to quickly...

Introduction to SAE J1587 / J1708 Truck Datalink Protocols – A Technician’s Primer

Introduction to SAE J1587 / J1708 Truck Datalin...

For technicians working on older heavy‑duty trucks (pre‑2013), understanding the SAE J1587 and J1708 protocols is essential—they govern how engine, transmission, brake, and instrument modules communicate fault codes and live data...

Introduction to SAE J1587 / J1708 Truck Datalin...

For technicians working on older heavy‑duty trucks (pre‑2013), understanding the SAE J1587 and J1708 protocols is essential—they govern how engine, transmission, brake, and instrument modules communicate fault codes and live data...

11 Fault Code Myths Debunked – What Technicians Really Need to Know

11 Fault Code Myths Debunked – What Technicians...

1. “If the truck runs fine, I can ignore fault codes.” Fault codes are early warning signs—even if the engine seems okay. Ignoring them can lead to major failures later....

11 Fault Code Myths Debunked – What Technicians...

1. “If the truck runs fine, I can ignore fault codes.” Fault codes are early warning signs—even if the engine seems okay. Ignoring them can lead to major failures later....