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Home >> Infiniti >> 2008 >> G37 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - G37 Coupe - DTC U0113, U1000, U1001, U1003, U1010, U1011 & U1024; DTC P0011 Through P0223 >> P0128 Thermostat Function >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK ENGINE COOLANT TEMPERATURE SENSOR

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 2.

    NO: Replace engine coolant temperature sensor.

  2. CHECK THERMOSTAT

    Check thermostat. Refer to "INSPECTION ".

    Is the inspection result normal? 

    YES: INSPECTION END

    NO: Replace thermostat.

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