Detroit Diesel
    DDEC flash code

    Detroit Flash Code 63: PWM #3 Above Normal Range

    63 on Detroit Diesel engines means: PWM #3 Above Normal Range. The failure mode (FMI 0) is “data valid but above normal operating range (most severe)”.

    Code details

    Manufacturer
    Detroit Diesel
    Applies to
    Detroit Diesel Series 60 EGR (DDEC IV)
    Fault code
    63
    FMI
    0 — Data valid but above normal operating range (most severe)
    J1587 PID / SID
    SID 59

    What to do next

    • Read active and inactive codes with the OEM service tool (Detroit Diesel Diagnostic Link) and note the occurrence count.
    • FMI 0 tells the shop the type of failure to test for: data valid but above normal operating range (most severe).
    • 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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    Related fault codes

    Source: Detroit Diesel Series 60 EGR Technician's Guide, DDEC IV EGR fault code table (Table 4-1). See also OBD-II codes.