Cummins
    Cummins fault code

    Cummins Fault Code 749: Fault Log Snapshot Data Nearly Full

    749 on Cummins engines means: Fault Log Snapshot Data Nearly Full.

    Lamp: None

    Information only – no lamp action.

    Code details

    Manufacturer
    Cummins
    Applies to
    Cummins QS-series electronic engines
    Fault code
    749
    Engine models
    QST30
    QSK45/60/78 severity level
    QSK45: 4 • QSK60: 4 • QSK78: 4

    What to do next

    • Read active and inactive codes with the OEM service tool and note the occurrence count.
    • Have a heavy-duty diesel technician confirm the fault against the engine or chassis service manual before replacing parts.

    Get this code diagnosed

    Send one request and nearby diesel shops and mobile mechanics can quote the repair.

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    Source: Cummins "Diagnostic Fault Codes For Cummins Engines", publication 80-1044 Rev 5/2013, page 23. Marked in the source as a CENSE fault code. See also OBD-II codes.