Tech notesIf cooling system is not leaking and the fluid level is OK, replacing the thermostat usually takes care of the problem.
When is the code detected?The engine coolant temperature does not reach to specified temperature even though the engine has run long enough.
P0128 DescriptionIndicates that the thermostat monitor has not achieved the required engine operating temperature within a specified amount of time after starting the engine.
P0128 Information for specific makes
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