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Cummins Engines · 1117
Power Supply Lost With Ignition On

What this code means

Power Supply Lost With Ignition On - Data Erratic, Intermittent, or Incorrect

Applies to: all electronic engines.

Possible causes / checks (from the source)

SPN 627, FMI 2 in the Cummins industrial (AEB) list; SPN 3597, FMI 2 in on-highway lists (e.g. CM2880B AEB 15.198) — SPN varies by ECM package; Lamp: None

Need the part?

If diagnosis points to a failed sensor, solenoid, controller or harness part, send us the code (1117), machine model and serial number — we quote genuine and OEM replacement parts for export.

Source: Diesel Service Parts — Cummins ISX CM871 fault code list; cross-checked vs Cummins Engine Fault Code List (Scribd) and CM2880B AEB 15.198 Appendix B (Scribd). Cross-checked in two independent sources. Compiled 2026-10-30. No manufacturer affiliation.