Cummins
Cummins fault code
SPN 630 / FMI 13
Cummins Fault Code 342: Engine Control Module – out of calibration
342 on Cummins engines means: Engine Control Module – out of calibration. The failure mode (FMI 13) is “out of calibration”.
Lamp: Red
Stop engine now – damage imminent.
Code details
- Manufacturer
- Cummins
- Applies to
- Cummins QS-series electronic engines
- Fault code
- 342
- J1939 SPN
- 630
- FMI
- 13 — Out of calibration
- J1587 PID / SID
- S253
- Engine models
- QST30
What to do next
- Treat this as a stop-level fault: shut down safely and get the truck checked before running it further.
- Read active and inactive codes with the OEM service tool and note the occurrence count.
- FMI 13 tells the shop the type of failure to test for: out of calibration.
- 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: Cummins "Diagnostic Fault Codes For Cummins Engines", publication 80-1044 Rev 5/2013, page 10. See also OBD-II codes.