Start by checking for coolant leaks, if there are not leaks the thermostat might be stuck open or closed and may need to be replaced, you still have an issue the engine coolant temp sensor or cylinder head temp sensor.
Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
The cost to diagnose the P0128 2010 Ford Fusion code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.
The engine coolant temperature does not reach to specified temperature even though the engine has run long enough.
Indicates that the thermostat monitor has not achieved the required engine operating temperature within a specified amount of time after starting the engine.
Need more information on how to fix the P0128 2010 Ford Fusion code? Get Access to Factory Service Manuals
Get the P0128 2010 Ford Fusion code diagnosed by a professional: Find a repair shop in your area