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Home >> Infiniti >> 2005 >> Q45 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS U1000 To P0430 >> 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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