SAE J1939

UnclassifiedCooling

What This Code Means

Loss of power; White smoke; Coolant consumption; Hydrostatic lock; Erratic throttle response; Reduced thermal efficiency

Possible Causes

•Clogging of air-to-air aftercooler fins
•Coolant enters intake
•Dusty environment
•Faulty charge air cooler (aftercooler)
•JDEC electronic governor failure
•JDEC electronic governor malfunction

Suggested Actions

1Use diagnostic software for fault isolation

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Get a diagnosis walkthrough for SAE J1939 on your specific MTU unit — cited to the OEM manual, not a forum guess.