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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 2412 (Engine Control System - DTCS U0101 To P0183 (VQ40DE)) >> DTC P0128: Thermostat Function >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK ENGINE COOLANT TEMPERATURE SENSOR

    Refer to "COMPONENT INSPECTION ".

    OK or NG 

    OK: GO TO 2.

    NG: Replace engine coolant temperature sensor. Refer to "REMOVAL AND INSTALLATION ".

  2. CHECK THERMOSTAT

    Refer to "REMOVAL AND INSTALLATION ".

    OK or NG 

    OK: INSPECTION END 

    NG: Replace thermostat.

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