Cummins fault code7599 · Exhaust Gas Temperature Sensor Module 6
Exhaust Gas Temperature Sensor Module 6 - Condition Exists
7599 Cummins fault code as shown in INSITE / CaltermSPN521154 · Exhaust Gas Temperature Sensor Module 6FMI31 Condition existsOBD codenone (J1939 only)LampAmber WARNING lampCummins textExhaust Gas Temperature Sensor Module 6 - Condition ExistsFailure modeCondition ExistsWhat Cummins code 7599 means
This is not an electrical fault on a sensor. FMI 31 means the ECM has detected that the named condition for Exhaust Gas Temperature Sensor Module 6 is true. The fault code itself is the message; the fix is to find out why the ECM believes the condition exists.
It lights the amber CHECK ENGINE (warning) lamp. The engine keeps running, but a torque or speed derate may apply depending on the calibration and on how long the fault stays 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 521154 FMI 31 rather than as Cummins code 7599. 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 521154 Exhaust Gas Temperature Sensor Module 6
2 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 31 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 7599
What does Cummins fault code 7599 mean?
Cummins 7599 is "Exhaust Gas Temperature Sensor Module 6 - Condition Exists". It maps to SPN 521154 FMI 31. This is not an electrical fault on a sensor. FMI 31 means the ECM has detected that the named condition for Exhaust Gas Temperature Sensor Module 6 is true. The fault code itself is the message; the fix is to find out why the ECM believes the condition exists.
Which lamp does fault code 7599 turn on?
Amber WARNING lamp: It lights the amber CHECK ENGINE (warning) lamp. The engine keeps running, but a torque or speed derate may apply depending on the calibration and on how long the fault stays active.
How do I clear or permanently delete Cummins code 7599?
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 7599 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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