Overheating — Possible Fault Codes

Found 3 fault codes associated with overheating. Codes are sorted by severity — check STOP ENGINE codes first.

⚠️ 3 STOP ENGINE-level codes associated with this symptom. Do not continue driving.

SPN 111 FMI 18

Engine Coolant Level critically low

Cummins ISX15 • Component: Coolant Level Sensor / Cooling System • J1939

🔴 STOP ENGINE

SPN 110 FMI 15

Engine Coolant Temperature excessive

Detroit Diesel DD15 • Component: Cooling System / Thermostat • J1939

🔴 STOP ENGINE

SPN 111 FMI 18

Engine Coolant Level Low

International A26 • Component: Cooling System / EGR Cooler • J1939

🔴 STOP ENGINE

⚠️ 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 overheating based on SAE J1939/J1587 fault code definitions and OEM service documentation.