DTC P1401: EGR TEMPERATURE SENSOR Infiniti I30 I

1. Check Power Supply - Turn ignition off. Disconnect EGR temperature sensor harness connector. (Scheme 49) Turn ignition on. Measure voltage between EGR temperature sensor connector terminal No. 1 (Blue/Orange wire) and ground. If voltage is about 5 volts, go to next step. If voltage is not as specified, repair harness or connectors as necessary.
2. Check Output Circuit - Turn ignition off. Verify harness continuity between EGR temperature sensor connector terminal No. 2 (Black wire) and engine ground. If continuity is present, go to next step. If continuity is not present, repair harness or connectors as necessary.
3. Check Component - Remove EGR temperature sensor. Immerse sensor in fluid. Heat sensor to about 212° (100°C) degrees. Measure resistance between sensor terminals. If resistance is 76,800-93,800 ohms, go to next step. If resistance is not 76,800-93,800 ohms, replace EGR temperature sensor and perform FINAL CHECK.

Scheme 49