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Home >> Infiniti >> 2012 >> FX35 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 217 (Engine Control System (VK50VE) - FX50 - DTC U0101, U0113, U1003, U1001, U1024, & P006A Through P0133 / P0153) >> DTC P0128: Thermostat Function >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2011 Infiniti FX50. 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 ".

    Is the inspection result normal? 

    YES: INSPECTION END

    NO: GO TO 2.

  2. CHECK THERMOSTAT

    Refer to "REMOVAL AND INSTALLATION ".

    Is the inspection result normal? 

    YES: INSPECTION END

    NO: Replace thermostat. Refer to "REMOVAL AND INSTALLATION ".

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