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Engine Coolant Temperature – Condition Exists
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 2659 PID: P110 SPN: 110 FMI: LAMP: None SRT: |
Engine Coolant Temperature – Condition Exists. Engine coolant signal indicates coolant temperature is above the engine coolant temperature engine protection warning limit. |
Progressive power derate increasing in severity from time of alert. |
 Engine Coolant Temperature Sensor Circuit
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Circuit Description
The engine coolant temperature sensor is used by the ECM to monitor the engine coolant temperature. The ECM monitors the voltage on the signal pin and converts this to a temperature value. The engine coolant temperature value is used by the ECM for the engine protection system and engine emissions control. This fault code will result in an Engine Protection power derate.
Component Location
The engine coolant temperature sensor is located on the exhaust side of the engine, near the thermostat housing. Refer to Procedure 100-002 (Engine Views) in Section E for a detailed component location view.
Shop Talk
This fault code indicates that coolant temperature has exceeded the engine protection limits for high coolant temperature. Refer to Engine Coolant Temperature Above Normal symptom tree.
Refer to Troubleshooting Fault Code t05-2659
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