C11 and C13 Engines for Caterpillar Built Machines E059 Low Engine Coolant Level Warning Caterpillar


E059 Low Engine Coolant Level Warning
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Event E059

Conditions Which Generate This Code:

The Electronic Control Module (ECM) detects a problem with the engine's cooling system. Information on default settings and ranges for this event code can be found in Troubleshooting, "Event Codes".

System Response:

The event code will be logged.

Possible Performance Effect:

E059(1)

  • There are no performance effects.

Troubleshooting:

  • The coolant level is most likely low.

  • Air may be trapped in the cooling system.

  • There may be a problem with the coolant level sensor.

Test Step 1. Check the Coolant Level

    ------ WARNING! ------

    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.


  1. Stop the engine.

  2. After allowing the engine to cool, check the coolant level. Refer to the Operation and Maintenance Manual.

Expected Result:

The coolant level is low.

Results:

  • OK - The coolant level is low.

    Repair: Check the cooling system for leaks. Repair any problems that are found. Refill the cooling system to the proper level.

    STOP

  • Not OK - The coolant level is not low.

    Repair: Air may be trapped in the cooling system. For information on checking the cooling system, refer to the engine's Systems Operation/Testing and Adjusting manual.

    Ensure that any repairs eliminate the problem.

    STOP

  • Not OK - The coolant level is not low.

    Repair: There may be a problem with the coolant level sensor. Refer to the diagnostic functional test Troubleshooting, "Coolant Level Sensor Circuit - Test".

    Ensure that any repairs eliminate the problem.

    STOP

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