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Home >> Nissan-Datsun >> 2009 >> Sentra SE-R >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS U0101 To P0128 (Qr25DE) >> DTC P0125 ECT Sensor >> Component Inspection >> Engine Coolant Temperature Sensor
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Engine Coolant Temperature Sensor

  1. Check resistance between engine coolant temperature sensor terminals 1 and 2 as shown in the figure.
    Fig 1: Checking Resistance Between Engine Coolant Temperature Sensor Terminals 1 And 2
    G04874991Courtesy of NISSAN MOTOR CO., U.S.A.

    < Reference data > 

    RESISTANCE REFERENCE CHART

    Engine coolant temperature [°C (°F)] Resistance (kΩ)
    20 (68) 2.1 - 2.9
    50 (122) 0.68 - 1.00
    90 (194) 0.236 - 0.260
  2. If NG, replace engine coolant temperature sensor.
    Fig 2: Engine Coolant Temperature Resistance Graph
    G05923774Courtesy of NISSAN MOTOR CO., U.S.A.
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