ENGINE AR-COMPLETE 5398083 - Caterpillar

Table 1
Event Code    
Code and Description     Conditions which Generate this Code     System Response    
E057(2) Low Engine Coolant Level Derate     The engine coolant level has fallen below the coolant level sensor for the specified delay time.     Engine power is derated. The code is logged.    
E059(1) Low Engine Coolant Level Warning     The engine coolant level has fallen below the coolant level sensor for the specified delay time.     The code is logged.    
E552(2) Low Aftercooler Coolant Level Derate     The coolant level for the aftercooler has fallen below the coolant level sensor for the specified delay time.     Engine power is derated. The code is logged.    
E552(1) Low Aftercooler Coolant Level Warning     The coolant level for the aftercooler has fallen below the coolant level sensor for the specified delay time.     The code is logged.    Probable Causes
Low coolant level and/or coolant leakage
Coolant level sensorRecommended Actions
Low Coolant Level and/or Coolant Leakage
Inspect the coolant level. If necessary, add coolant.
Check for the correct mixture of antifreeze and water. Refer to Operation and Maintenance Manual.
Check the cooling system for leaks. Repair any leaks immediately.
Check for air in the cooling system. Refer to Systems Operation/Testing and Adjusting for the correct procedure.Coolant Level Sensor
If an electrical problem with the coolant level sensor is suspected, refer to Troubleshooting, "Coolant Level - Test".