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Home >> Suzuki >> 2009 >> Equator Premium >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Engine Control System (VQ40DE) - (4 Of 5)) >> DTC P0128: Thermostat Function >> Diagnosis Procedure
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Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
DIAGNOSIS PROCEDURE

Step Action YES NO
CHECK ENGINE COOLANT TEMPERATURE SENSOR 
Refer to [P0128 THERMOSTAT FUNCTION ].
OK or NG 
GO TO 2. Replace engine coolant temperature sensor.
CHECK THERMOSTAT 
Refer to [WATER INLET AND THERMOSTAT ASSEMBLY: REMOVAL AND INSTALLATION ]
OK or NG 
INSPECTION END Replace thermostat.