SPN 1569 FMI 15: Engine Protection Torque Derate - Data Valid But Above Normal (Cummins)

SPN 1569 FMI 15 - Engine Protection Torque Derate

**What This Means**: The ECM detected that certain critical fault codes related to engine operation were active AND the engine continued to operate [citation:10]. This is the engine protecting itself - torque is reduced to prevent damage.

🔍 Important Distinction

This code is for **information only** [citation:10]. It tells you:

• Engine power derate has been implemented
• Critical fault codes are currently active
• Those codes must be addressed ASAP

Common Companion Codes

SPN 1569 FMI 15 often appears with [citation:4]:

• **SPN 5426** - DEF/SCR derate codes
• **SPN 5246** - Operator inducement
• **SPN 100** - Oil pressure issues
• **SPN 110** - Coolant temperature high

⚠️ Critical Note

This fault code will go inactive once **all other active fault codes have been addressed** [citation:10]. You cannot clear it directly - fix the root cause codes first.

Real-World Example

A 2014 Anthem with Cummins showed SPN 1569 and SPN 5426 after parking on uneven ground [citation:4]. The DEF level sensor gave false "empty" reading due to angle, triggering the derate. Once on level ground and codes cleared, the truck ran fine.