DTC P1401: EGR Temperature Sensor
- Check Power Supply
- Turn ignition off. Disconnect EGR temperature sensor harness connector. See Figure. Turn ignition on. Measure voltage between EGR temperature sensor connector terminal No. 1 (Brown wire) and ground. If voltage is approximately 5 volts, go to next step. If voltage is not as specified, repair harness or connectors as necessary.
- Check Ground Circuit
- Turn ignition off. Verify harness continuity between EGR temperature sensor connector terminal No. 2 (Orange/Blue wire) and engine ground. If continuity is present, go to next step. If continuity is not present, repair harness or connectors as necessary.
- Check Component
- Remove EGR temperature sensor. Immerse sensor in fluid. Measure resistance of EGR temperature sensor while varying temperature of fluid. Ensure sensor resistance is correct. See EGR TEMPERATURE SENSOR RESISTANCE table. Repair or replace if necessary and perform FINAL CHECK.
EGR TEMPERATURE SENSOR RESISTANCE
| Temperature - °F (°C) |
Ohms |
| 32 (0) |
7.9-9.7 |
| 122 (50) |
.57-.70 |
| 212 (100) |
.08-1.0 |