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International Diesel Engine Fault Codes
Browse 14 diagnostic trouble codes across 1 engine series. Protocols: J1587, J1939.
🔴 3 STOP ENGINE
🟡 4 Check Next Stop
🟠 7 Check Soon
Navistar International produces the A26 engine, a 12.4-liter engine designed in collaboration with MAN Truck & Bus. The A26 is notable for its parent-bore cylinder design — cylinder walls are cast directly into the block, eliminating liner failures but making rebuild repairs more complex. International fault codes are generally consistent with SAE J1939 standards, but International uses some proprietary FMI encodings for manufacturer-specific fault conditions.
A26 Engine Series — 14 fault codes
SPN 111 FMI 18
Engine Coolant Level Low
SPN 641 FMI 5
VGT Turbo Actuator
SPN 3050 FMI 9
DPF Regeneration Too Frequent
MID 128 PID 111 FMI 4
Coolant Level Sensor
SPN 4334 FMI 4
DPF Differential Pressure Sensor Low Voltage
SPN 27 FMI 7
EGR Valve Position Error
SPN 1569 FMI 31
Engine Protection Torque Derate
SPN 4364 FMI 18
SCR NOx Conversion Low
SPN 3361 FMI 7
DPF Differential Pressure Fault
SPN 3480 FMI 4
Intake Manifold Pressure Sensor
SPN 4348 FMI 14
DEF Quality Out of Range
SPN 106 FMI 0
Air Filter Restriction High
SPN 164 FMI 0
Engine Oil Level High
SPN 3031 FMI 16
Exhaust Gas Temperature High