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Home >> Nissan-Datsun >> 2004 >> Sentra SE-R Spec V >> Repair and Diagnosis >> External Pages >> Different car >> Section 70 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0405: EGR Temperature Sensor Circuit Low Input Or DTC P0406: EGR Temperature Sensor Circuit High Input >> Diagnostic Procedure
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Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Nissan Xterra and 2002 Nissan Frontier. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition off. Disconnect EGR temperature sensor harness connector. See Fig 1 . Turn ignition on. Measure voltage between ground and EGR temperature sensor harness connector terminal No. 1 (Green/Orange wire). If voltage is about 5 volts, go to next step. If voltage is not about 5 volts, repair open or short between EGR temperature sensor and ECM.
  2. Turn ignition off. Check continuity between engine ground and EGR temperature sensor harness connector terminal No. 2 (Black/White wire). Continuity should exist. Also, check circuit for short to voltage. If problem is found, repair as necessary. If problem is not found, go to next step.
  3. Measure resistance between EGR temperature sensor terminals, with water at specified temperatures. See EGR TEMPERATURE SENSOR RESISTANCE  table under DIAGNOSTIC PROCEDURE under DTC P0400: EGR FUNCTION (2.4L). If resistance is as specified, go to next step. If resistance is not as specified, replace EGR temperature sensor.
  4. No problem is indicated at this time. Problem may be intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article.
Fig 1: Locating EGR Temperature Sensor
G00156660Courtesy of NISSAN MOTOR CO., U.S.A.
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