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Engine Coolant Temperature High – Warning
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 2963 PID: P110 SPN: 110 FMI: 0/16 LAMP: None SRT: |
Engine Coolant Temperature High – Warning. Engine coolant temperature signal indicates engine coolant temperature above engine protection warning limit. |
Progressive power derate increasing in severity from time of alert. |
 Engine Coolant Temperature
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Circuit Description
The engine coolant temperature sensor monitors coolant temperature and passes information to the electronic control module (ECM) through the engine harness. If the coolant temperature becomes too high, it will cause a derate condition.
Component Location
The engine coolant temperature sensor is located on the exhaust side of the engine in the thermostat housing. Refer to Section E for a detailed component location view.
Shop Talk
The engine coolant temperature sensor measures the temperature of the engine coolant as it passes through the thermostat housing. This fault code is activated if the engine coolant temperature is above 107°C [225°F] for at least five seconds.
Possible causes of this fault code include:
- Obstructed radiator
- Plugged vent lines
- Aerated coolant
- Other cooling system failure.
Refer to Troubleshooting Fault Code t05-2963
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