Cummins fault code8397 · HVESP2 Operational Status
HVESP2 Operational Status - Abnormal Update Rate
8397 Cummins fault code as shown in INSITE / CaltermSPN11205 · HVESP2 Operational StatusFMI9 Abnormal update rateOBD codenone (J1939 only)LampMaintenance lampCummins textHVESP2 Operational Status - Abnormal Update RateFailure modeAbnormal Update RateWhat Cummins code 8397 means
The ECM expected HVESP2 Operational Status to arrive on the datalink at a regular rate and it is arriving late or not at all. This is a communication fault between modules (J1939 / J1587 wiring, terminating resistors, or a module that is powered down or not responding) rather than a sensor fault.
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 11205 FMI 9 rather than as Cummins code 8397. 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 11205 HVESP2 Operational Status
16 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 9 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 8397
What does Cummins fault code 8397 mean?
Cummins 8397 is "HVESP2 Operational Status - Abnormal Update Rate". It maps to SPN 11205 FMI 9. The ECM expected HVESP2 Operational Status to arrive on the datalink at a regular rate and it is arriving late or not at all. This is a communication fault between modules (J1939 / J1587 wiring, terminating resistors, or a module that is powered down or not
Which lamp does fault code 8397 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 8397?
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 8397 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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