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DTC P1401: EGR Temperature Sensor: Procedure

  1. Turn ignition off. Disconnect EGR temperature sensor harness connector. See Fig 1. Turn ignition on. Measure voltage between EGR temperature sensor harness connector Pink/Green wire and ground. If voltage is about 5 volts, go to next step. If voltage is not about 5 volts, repair open or short in Pink/Green wire.
  2. Turn ignition off. Check continuity between EGR temperature sensor harness connector Black wire and ground. If continuity exists, go to next step. If continuity does not exist, repair open in Black wire.
  3. Remove EGR temperature sensor. Measure resistance between EGR temperature sensor terminals with EGR temperature sensor at specified temperatures. See EGR TEMPERATURE SENSOR RESISTANCE  table. If resistance is not as specified, replace EGR temperature sensor. If resistance is as specified, go to next step.
  4. No problem is currently indicated. Problem may be intermittent. See TESTING PROCEDURE under SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS - INTRODUCTION article.
EGR TEMPERATURE SENSOR RESISTANCE

Temperature °F (°C) K/Ohms
32 (0) 7900-9700
122 (50) 570-700
212 (100) 80-100
Fig 1: Locating EGR Temperature Sensor Harness Connector
G99I51993Courtesy of NISSAN MOTOR CO., U.S.A.
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