Fault Codes/Cummins/LOW COOLANT 1 LEVELCumminsLOW COOLANT 1 LEVELUnclassifiedStartingWhat This Code MeansWarning lamp illuminated; Equipment shutdown requiring restartPossible Causes•Low coolant levelSuggested Actions1Locate and correct the problem2Restart the controlRelated Cummins Fault CodesFAIL-TO-SYNCHRONIZEFAIL TO START35LOW COOLANT ALARMLOW COOLANT LEVELLOW BATTERY VOLTAGE WARNINGLOW COOLANT LEVEL ALARML028LOW COOLANT TEMPERATURE WARNINGINTERMITTENT FAULT CODESLOW LUBE OIL PRESSURE WARNING/SHUTDOWNINJECTOR FAULT CODESBrowse all Cummins fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for LOW COOLANT 1 LEVEL on your specific Cummins unit — cited to the OEM manual, not a forum guess.TRY IT FREE