Cummins Fault Code 143 — Engine Oil Rifle Pressure Below Normal Range

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Cummins Engines · 143

Engine Oil Rifle Pressure Below Normal Range

What this code means

Engine Oil Rifle Pressure - Data Valid But Below Normal Operating Range - Moderately Severe Level

Applies to: ISX CM871 (2007-2010).

Possible causes / checks (from the source)

SPN 100, FMI 18; Lamp: Amber

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Source: 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.