Engine Coolant Temperature (ECT) Sensor
- Faults in engine (coolant) temperature sensor circuit should set Diagnostic Trouble Code (DTC) P0115, or DTC P0125. To test system, see DTC P0115 OR P0125 - ENGINE COOLANT TEMPERATURE (ECT) SENSOR in the TESTS W/CODES article.
- To test sensor, disconnect sensor connector. See ENGINE COOLANT TEMPERATURE (ECT) SENSOR LOCATION table. Measure resistance across sensor connector terminals. See ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE table. If resistance is not as specified, replace sensor.
ENGINE COOLANT TEMPERATURE (ECT) SENSOR LOCATION
| Application | Location |
|---|---|
| Sentra | On Intake Manifold, Below Engine Oil Filler Cap |
ENGINE (COOLANT) TEMPERATURE SENSOR RESISTANCE
| Temperature - °F (°C) | Ohms |
|---|---|
| 68 (20) | 2100-2900 |
| 122 (50) | 680-1000 |
| 176 (80) | 300-330 |
| 194 (90) | 236-260 |