Cummins fault code916 · Spark Plug Flash-over Cylinder 15 (A8)
Spark Plug Flash-over Cylinder 15 (A8) - Root Cause Not Known
916 Cummins fault code as shown in INSITE / CaltermSPN1308 · Engine Spark Plug 15 (A8) VoltageFMI11 Root cause not knownOBD codenone (J1939 only)LampMaintenance lampCummins textSpark Plug Flash-over Cylinder 15 (A8) - Root Cause Not KnownFailure modeRoot Cause Not KnownWhat Cummins code 916 means
The ECM knows something is wrong with Spark Plug Flash-over Cylinder 15 (A8) but cannot narrow the cause down to one of the standard failure modes. Treat the whole circuit and the component as suspect and follow the Cummins troubleshooting tree for the code.
It drives the MAINTENANCE lamp rather than the warning or stop lamp: the ECM is asking for service attention, not an immediate stop.
On a generic J1939 scan tool, or on the dash of a Freightliner, Kenworth, Peterbilt, International or Volvo chassis, the same fault is shown as SPN 1308 FMI 11 rather than as Cummins code 916. Cummins INSITE and Calterm show the Cummins number, the SPN / FMI pair and the lamp together.
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Find your ECFG →Other Cummins codes on SPN 1308 Engine Spark Plug 15 (A8) Voltage
4 other fault codes share this SPN; each one is a different failure mode (FMI) of the same component.
Related Cummins fault codes
J1939 failure mode identifiers (FMI)
FMI 11 is highlighted. The FMI is the second half of every J1939 fault and tells you how the component failed; the SPN tells you which component.
| FMI | Meaning (SAE J1939-73) |
|---|---|
| 0 | Data valid but above normal operational range - most severe level |
| 1 | Data valid but below normal operational range - most severe level |
| 2 | Data erratic, intermittent or incorrect |
| 3 | Voltage above normal, or shorted to high source |
| 4 | Voltage below normal, or shorted to low source |
| 5 | Current below normal or open circuit |
| 6 | Current above normal or grounded circuit |
| 7 | Mechanical system not responding or out of adjustment |
| 8 | Abnormal frequency, pulse width or period |
| 9 | Abnormal update rate |
| 10 | Abnormal rate of change |
| 11 | Root cause not known |
| 12 | Bad intelligent device or component |
| 13 | Out of calibration |
| 14 | Special instructions |
| 15 | Data valid but above normal operating range - least severe level |
| 16 | Data valid but above normal operating range - moderately severe level |
| 17 | Data valid but below normal operating range - least severe level |
| 18 | Data valid but below normal operating range - moderately severe level |
| 19 | Received network data in error |
| 20 | Data drifted high |
| 21 | Data drifted low |
| 22 | Reserved for SAE assignment |
| 23 | Reserved for SAE assignment |
| 24 | Reserved for SAE assignment |
| 25 | Reserved for SAE assignment |
| 26 | Reserved for SAE assignment |
| 27 | Reserved for SAE assignment |
| 28 | Reserved for SAE assignment |
| 29 | Reserved for SAE assignment |
| 30 | Reserved for SAE assignment |
| 31 | Condition exists |
Questions about code 916
What does Cummins fault code 916 mean?
Cummins 916 is "Spark Plug Flash-over Cylinder 15 (A8) - Root Cause Not Known". It maps to SPN 1308 FMI 11. The ECM knows something is wrong with Spark Plug Flash-over Cylinder 15 (A8) but cannot narrow the cause down to one of the standard failure modes. Treat the whole circuit and the component as suspect and follow the Cummins troubleshooting tree for the code.
Which lamp does fault code 916 turn on?
Maintenance lamp: It drives the MAINTENANCE lamp rather than the warning or stop lamp: the ECM is asking for service attention, not an immediate stop.
How do I clear or permanently delete Cummins code 916?
An active code goes inactive on its own once the condition is gone; the inactive record stays in the ECM fault history until it is cleared with Cummins INSITE (or a J1939 tool that supports the DM3 / DM11 clear). If the code keeps coming back because the part is gone, disconnected or not worth repairing, the lasting fix is to disable fault 916 in the calibration: upload your .xcal to the ECFG Superstore file service, custom DTC delete from $150 (up to 30 codes), full DPF / EGR / SCR delete $500, and flash the returned file with Calterm or INSITE.
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