Cummins 2659 Engine Coolant Temperature - Condition Exists
What this code means
Cummins fault code 2659 (SPN 110 / FMI 31) refers to: Engine Coolant Temperature - Condition Exists. 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 2659 (SPN 110 / FMI 31) indicates engine coolant temperature - condition exists.
Cummins 2659 is generally treated as a moderate-severity fault. Have the engine and its wiring inspected, and confirm the reading with a J1939 diagnostic scan before clearing the code.
