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Cummins Engines · 1922
Aftertreatment Particulate Filter Differential Pressure Critically High
What this code means
Aftertreatment Particulate Filter Differential Pressure - Data Valid But Above Normal Operating Range - Most Severe Level (high DPF soot load / differential pressure)
Applies to: ISX CM871 (2007-2010).
Possible causes / checks (from the source)
SPN 3251, FMI 0
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Ask for the replacement part on WhatsAppSource: Diesel Service Parts — Cummins ISX CM871 fault code list; SPN/FMI cross-checked vs 30-Minute DPF Clean Cummins fault code list. Cross-checked in two independent sources. Compiled 2026-10-30. No manufacturer affiliation.