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Home >> Nissan-Datsun >> 2009 >> Quest Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS U0101 To P0153 >> DTC P0128 Thermostat Function >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK ENGINE COOLANT TEMPERATURE SENSOR

    Refer to , "COMPONENT INSPECTION ".

    OK or NG 

    OK: GO TO 2.

    NG: Replace engine coolant temperature sensor.

  2. CHECK THERMOSTAT

    Refer to REMOVAL AND INSTALLATION .

    OK or NG 

    OK: INSPECTION END

    NG: Replace thermostat.

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