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Cummins Engines · 245
Fan Control Circuit Low
What this code means
Fan Control Circuit - Voltage Below Normal or Shorted to Low Source
Applies to: ISX CM871 (2007-2010).
Possible causes / checks (from the source)
SPN 647, FMI 4; Lamp: Amber
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If diagnosis points to a failed sensor, solenoid, controller or harness part, send us the code (245), machine model and serial number — we quote genuine and OEM replacement parts for export.
Ask for the replacement part on WhatsAppSource: Diesel Service Parts — Cummins ISX CM871 fault code list; cross-checked vs Cummins Engine Fault Code List (Scribd). Cross-checked in two independent sources. Compiled 2026-10-30. No manufacturer affiliation.