LOW COOLANT ALARM

UnclassifiedCooling

What This Code Means

Hard start; Rough running; Black smoke; Reduced power output; Coolant seeping at joints; Engine overtemperature; Slow crank

Possible Causes

  • •Faulty fuel injectors (B3.3 inline-4)
  • •Loose or damaged cooling system hoses and clamps
  • •Starting battery bank failure
  • •Extended no-load storage

ASK RUDY ABOUT THIS FAULT

Get a diagnosis walkthrough for LOW COOLANT ALARM on your specific Cummins unit — cited to the OEM manual, not a forum guess.

GET THE ANSWER

Free account required — we'll bring your question with you.