E199 Low Coolant Temperature
Conditions Which Generate This Code:
The Electronic Control Module (ECM) detects a low coolant temperature. 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:
E198-1(Warning)
None
Test Step 1. Perform a Check of the Cooling System.
- Check that the coolant temperature regulators are functioning correctly.
- If equipped, check the correct operation of the jacket water heater.
Refer to the Systems Operation/Testing and Adjusting manual for information on testing the cooling system for an overcooling condition.
Expected Result:
A problem with the cooling system has been identified.
Results:
- OK - The problem has been identified.
Repair: Repair the problem. Monitor the operation of the engine after the repair has been completed. Ensure that the repair eliminates the problem.
STOP
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