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Cummins Engines · 187
Sensor Supply 2 Circuit Low
What this code means
Sensor Supply 2 Circuit - Voltage Below Normal or Shorted to Low Source
Applies to: ISX CM871 (2007-2010).
Possible causes / checks (from the source)
SPN 3510, FMI 4; Lamp: Amber (per CM871/876/2150 Electronic Subsystem Technical Package)
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Ask for the replacement part on WhatsAppSource: Diesel Service Parts — Cummins ISX CM871 fault code list; cross-checked vs CM871/876/2150 Electronic Subsystem Technical Package (Scribd). Cross-checked in two independent sources. Compiled 2026-10-30. No manufacturer affiliation.