Cummins Fault Code 2963 — Engine Coolant Temperature Slightly High

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Cummins Engines · 2963

Engine Coolant Temperature Slightly High

What this code means

Engine Coolant Temperature - Data Valid But Above Normal Operating Range - Least Severe Level

Applies to: ISX CM871 (2007-2010).

Possible causes / checks (from the source)

SPN 110, FMI 15; Lamp: None

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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.