Fault Codes/Caterpillar Inc./1453Caterpillar Inc.1453UnclassifiedCoolingWhat This Code MeansReduced startability at temperatures below 12 °C (55 °F)Possible Causes•Cold weather / temperatures below 12 °C (55 °F)Suggested Actions1Use recommended starting aids (Jacket Water Heater or Crankcase Oil Heater) before starting the engine2Ensure heated fluid is continuously circulated to prevent localized overheating3Check starting air pressure (minimum 690 kPa / 100 psi, maximum 1030 kPa / 150 psi) and open air supply valveRelated Caterpillar Inc. Fault Codes1456190014501361-04012501205-04010001453-0401451-0401466-543-M&SBrowse all Caterpillar Inc. fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 1453 on your specific Caterpillar Inc. unit — cited to the OEM manual, not a forum guess.Your question about 1453GET THE ANSWERFree account required — we'll bring your question with you.