Cummins fault code14579 · Aftertreatment 2 Diesel Particulate Filter Intermediate Temperature Preliminary FMI
Aftertreatment 2 Diesel Particulate Filter Intermediate Temperature Preliminary FMI - Data Valid But Above Normal Operating Range - Most Sev
14579 Cummins fault code as shown in INSITE / CaltermSPN3288 · Aftertreatment 2 Diesel Particulate Filter Intermediate Temperature Preliminary FMIFMI0 Data valid but above normal operational range - most severe levelOBD codenone (J1939 only)LampRed STOP lampCummins textAftertreatment 2 Diesel Particulate Filter Intermediate Temperature Preliminary FMI - Data Valid But Above Normal Operating Range - Most SevFailure modeData Valid But Above Normal Operating Range - Most SevWhat Cummins code 14579 means
The reading for Aftertreatment 2 Diesel Particulate Filter Intermediate Temperature Preliminary FMI is believed to be correct, but it has gone above the highest limit in the calibration. This is the most severe of the three "above range" levels (FMI 15, 16 and 0), so the ECM is reporting a real operating problem rather than a wiring fault.
It turns on the red STOP ENGINE lamp. Cummins classes this as a fault that can damage the engine or aftertreatment if ignored: stop as soon as it is safe to do so. Many calibrations also apply an engine-protection derate while the fault is active.
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 3288 FMI 0 rather than as Cummins code 14579. Cummins INSITE and Calterm show the Cummins number, the SPN / FMI pair and the lamp together.
This is an emissions-system code. If the component it refers to has been removed or unplugged (DPF, EGR, SCR / DEF or NOx sensor delete) the code will keep returning and the derate with it, however many times it is cleared, because the diagnostic is still enabled in the calibration. The lasting fix in that case is to disable the fault in the .xcal itself.
Custom DTC delete, up to 30 codes, $150. Full DPF / EGR / SCR delete with all related codes and derates, $500. Upload your Calterm .xcal, tick the services, pay with PayPal, and the finished file comes back by email and WhatsApp.
Upload your .xcal →Cummins ECFG / E2M definitions for CM550, CM552, CM554, CM570, CM800, CM850, CM870, CM871 and more: the fault table, torque, fuelling, boost, EGR, DPF and SCR maps, ready for Calterm or WinOLS. Instant download.
Find your ECFG →Other Cummins codes on SPN 3288 Aftertreatment 2 Diesel Particulate Filter Intermediate Temperature Preliminary FMI
Code 14579 is the only Cummins fault code assigned to SPN 3288.
Related Cummins fault codes
J1939 failure mode identifiers (FMI)
FMI 0 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 14579
What does Cummins fault code 14579 mean?
Cummins 14579 is "Aftertreatment 2 Diesel Particulate Filter Intermediate Temperature Preliminary FMI - Data Valid But Above Normal Operating Range - Most Sev". It maps to SPN 3288 FMI 0. The reading for Aftertreatment 2 Diesel Particulate Filter Intermediate Temperature Preliminary FMI is believed to be correct, but it has gone above the highest limit in the calibration. This is the most severe of the three "above range" levels (FMI 15, 16 and
Which lamp does fault code 14579 turn on?
Red STOP lamp: It turns on the red STOP ENGINE lamp. Cummins classes this as a fault that can damage the engine or aftertreatment if ignored: stop as soon as it is safe to do so. Many calibrations also apply an engine-protection derate while the fault is active.
How do I clear or permanently delete Cummins code 14579?
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 14579 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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