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Home › Infiniti › 2012 › G25 Base › Repair and Diagnosis › Engine Performance › System › Engine Control System - DTCS U0101 To P0128 › DTC P0125: ECT Sensor › Component Inspection

Component Inspection

  1. CHECK ENGINE COOLANT TEMPERATURE SENSOR
    1. Turn ignition switch OFF.
    2. Disconnect engine coolant temperature sensor harness connector.
    3. Remove engine coolant temperature sensor. Refer to "VQ37VHR: EXPLODED VIEW ".
    4. Check resistance between engine coolant temperature sensor terminals by heating with hot water as shown in the figure.
      Terminals Condition Resistance (kΩ)
      1 and 2 Temperature [°C (°F)] 20 (68) 2.37 - 2.63
      50 (122) 0.68 - 1.00
      90 (194) 0.236 - 0.260
      Fig 1: Checking Engine Coolant Temperature Sensor
      G08451534Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: INSPECTION END

      NO: Replace engine coolant temperature sensor. Refer to "VQ37VHR: EXPLODED VIEW ".

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