Fault Codes/Cummins/212Cummins212UnclassifiedGeneralWhat This Code MeansCoolant temperature sensor output is out of range (high or low)Possible Causes•Coolant temperature sensor output is out of range (OOR), high or lowSuggested Actions1Change default fault values using the Genset Setup menus (if authorized)Related Cummins Fault Codes213214205216195218154219153220150221Browse all Cummins fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 212 on your specific Cummins unit — cited to the OEM manual, not a forum guess.Your question about 212GET THE ANSWERFree account required — we'll bring your question with you.