Engine Derate — Possible Fault Codes
Found 7 fault codes associated with engine derate. Codes are sorted by severity — check STOP ENGINE codes first.
⚠️ 3 STOP ENGINE-level codes associated with this symptom. Do not continue driving.
SPN 1569 FMI 31
Engine Protection Torque Derate
Cummins ISX15 • Component: Engine Control Module (ECM) • J1939
SPN 102 FMI 18
Intake Manifold Pressure critically low
Cummins ISX15 • Component: Turbocharger / Charge Air System • J1939
SPN 1077 FMI 14
High Pressure Fuel Rail Pressure
PACCAR MX-13 • Component: High Pressure Fuel Pump / Rail • J1939
SPN 4364 FMI 18
SCR Inducement Active
Cummins X15 • Component: Selective Catalytic Reduction (SCR) System • J1939
SPN 641 FMI 5
VGT Turbo Actuator
International A26 • Component: Variable Geometry Turbocharger (VGT) Actuator • J1939
SPN 174 FMI 0
Fuel Temperature
Volvo D13 • Component: Fuel Temperature Sensor / Fuel Cooler • J1939
MID 128 PID 102 FMI 3
Boost Pressure Sensor
Cummins ISX15 • Component: Intake Manifold Pressure Sensor • J1587
⚠️ Diagnostic Note:
Symptoms can have multiple root causes. Always verify with a diagnostic scan tool before replacing parts. The fault codes listed above are possible matches for engine derate based on SAE J1939/J1587 fault code definitions and OEM service documentation.