GLASS 1875383 - Caterpillar

Conditions Which Generate This Code:The engine has been running for one minute and the coolant level is not being detected by the coolant level sensor.System Response:The Electronic Control Module (ECM) will log the event.The Caterpillar Electronic Technician (ET) displays "Engine Derate" on the status screen.The ECM will derate engine power by 35 percent. The engine power will be derated at a rate of one percent per second.Test Step 1. Check the Engine Coolant Level
Pressurized System: Hot coolant can cause serious burns. To open the cooling system filler cap, stop the engine and wait until the cooling system components are cool. Loosen the cooling system pressure cap slowly in order to relieve the pressure.
Check the coolant level of the engine. Refer to Operation and Maintenance Manual, "Cooling System Coolant Level - Check".Expected Result:The coolant level is OK.Results:
OK - The coolant is at the appropriate level. There may be a problem with the coolant level sensor.Repair: Test the operation of the coolant level sensor. Refer to Troubleshooting, "Coolant Level Sensor Circuit - Test".STOP
Not OK - The coolant level is low.Repair: Fill the cooling system with the appropriate coolant. Verify that the repair eliminates the problem.STOP