Fault Codes/Cummins/FAIL TO STARTCumminsFAIL TO STARTUnclassifiedStartingWhat This Code MeansEngine fails to startPossible Causes•Engine fails to fire during three cranking attemptsRelated Cummins Fault CodesFAIL-TO-SYNCHRONIZELOW COOLANT 1 LEVEL35FAIL TO START (OVERCRANK) SHUTDOWNFAIL-TO-START FAULTFAIL TO SHUTDOWN FAULTFAIL TO SHUTDOWNFAIL-TO-SYNCHRONIZE WARNINGFAIL TO CRANK SHUTDOWNFUEL PRESSURE FAULT CODESF525Browse all Cummins fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for FAIL TO START on your specific Cummins unit — cited to the OEM manual, not a forum guess.Your question about FAIL TO STARTGET THE ANSWERFree account required — we'll bring your question with you.