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Home › Nissan-Datsun › 2004 › Quest SL › Repair and Diagnosis › Engine Performance › System › Engine Control System › DTC P0128: Thermostat Function › Diagnostic Procedure

Diagnostic Procedure

  1. CHECK ENGINE COOLANT TEMPERATURE SENSOR 

    Refer to COMPONENT INSPECTION  .

    OK or NG 

    1. OK: INSPECTION END 
    2. NG: Replace engine coolant temperature sensor.
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