Cummins ISB CM850 (2003-06) Fault Code: 146 (Marine) PID: 100 SPN: 110 FMI: 0 Engine Coolant Temperature – Data Valid but Above Normal Operational Range – Moderately Severe Level. Engine coolant temperature signal indicates engine coolant temperature is above engine protection warning limit.

This fault code indicates that coolant temperature has exceeded the engine protection limits for high coolant temperature. Refer to Engine Coolant Temperature Above Normal symptom troubleshooting tree.

Possible repairs:

1)This fault code indicates that coolant temperature has exceeded the engine protection limits for high coolant temperature. Refer to Engine Coolant Temperature Above Normal symptom troubleshooting tree.

Possible repairs:

1)Refer to the Engine Coolant Temperature Above Normal symptom tree in Troubleshooting and Repair Manual, ISBe and ISB (Common Rail Fuel System) Series Engines, Bulletin 4021271.