Symptom Tree
Electronic fault codes are active |
For instructions on how to read active fault codes, refer to Procedure 101-007 (Electronic Controlled Fuel System) in Section 1. If fault codes are active, contact a Cummins Authorized Repair Facility. |
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Engine is operating at low ambient temperature |
Check the winterfront, shutters, and under-the-hood air. Use under-the-hood intake air in cold weather. Refer to Procedure 101-015 (Operating the Engine) in Section 1. |
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Radiator shutters are stuck open or opening early |
Check the shutter operation. Repair or replace the shutters if necessary. Refer to Procedure 101-015 (Operating the Engine) in Section 1 and OEM service manual. |
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Coolant temperature gauge or sensor is malfunctioning |
Test the gauge and the sensor. Repair or replace, if necessary. Refer to the OEM service manual. |
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Contact a Cummins Authorized Repair Facility |