1900
UnclassifiedCooling
What This Code Means
Engine WARNING response; Engine DERATE response; Engine SHUTDOWN response; Event logged into ECM
Possible Causes
- •Ambient temperatures below 12 °C (55 °F)
- •Cold lube oil unable to flow sufficiently
- •Cold weather / temperatures below 12 °C (55 °F)
- •Critical operating coolant level reached
- •Critical operating pressure level reached
- •Critical operating speed (rpm) reached
- •Critical operating temperature level reached
- •Engine parameter exceeds acceptable range
- •Heated fluid is not continuously circulated
- •Potential problem with a gauge
- •Potential problem with the engine
- •Setpoint for a parameter is exceeded
Suggested Actions
- 1Consult Caterpillar dealer for assistance
- 2Correct the cause of the significant change in the readings
- 3Determine the cause of the engine shutdown and make necessary repairs
- 4Determine the cause of the significant change in the readings
- 5Do not use oil pan immersion heaters for heating lube oil
- 6Do not use oil pan immersion heaters for heating the lube oil
- 7Ensure heated fluid is continuously circulated to prevent localized overheating
- 8Ensure the fluid that is heated is continuously circulated
- 9Only use starting aid equipment recommended by Caterpillar to ensure component compatibility
- 10Reset the particular shutoff before attempting to restart the engine
- 11See Service Manual 'Troubleshooting' module
- 12Use Caterpillar-recommended starting aids (Jacket Water Heater or Crankcase Oil Heater) when temperatures fall below 13 °C (55 °F)
- 13Use a starting aid (such as a Jacket Water Heater or Crankcase Oil Heater) at temperatures below 13 °C (55 °F)
- 14Use an ET service tool to select available responses, program monitoring levels, and set delay times
Related Caterpillar Fault Codes
ASK RUDY ABOUT THIS FAULT
Get a diagnosis walkthrough for 1900 on your specific Caterpillar unit — cited to the OEM manual, not a forum guess.
GET THE ANSWER
Free account required — we'll bring your question with you.