Cummins 2789 Engine Coolant Temperature - Data Valid But Below Normal Operating Range - Moderately Severe Level
What this code means
Cummins fault code 2789 (SPN 110 / FMI 18) refers to: Engine Coolant Temperature - Data Valid But Below Normal Operating Range - Moderately Severe Level. It is logged by the engine control module (ECM) on Cummins-powered vehicles and read over the J1939 diagnostic network.
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Cummins fault code 2789 (SPN 110 / FMI 18) indicates engine coolant temperature - data valid but below normal operating range - moderately severe level.
Cummins 2789 is generally treated as a serious fault. Have the engine and its wiring inspected, and confirm the reading with a J1939 diagnostic scan before clearing the code.
