Skip the auto shop - Our mechanics make house calls

Q: Thermostat - 2009 Mercury Milan

asked by on

Service engine light came on i was told it was the thermostat housing assembly but my car isnt overheating and they said i couldnt just replace the sensor on the thermostat

My car has 123000 miles.
My car has an automatic transmission.

Hello there. This is a common issue with your Mercury Milan. If the coolant temperature sensor reads improperly, it will set the service engine light and require replacement. This sensor is located in the thermostat housing. You can buy the thermostat housing with the sensor, or without it and the old sensor will need to be swapped. For help having this done, a certified technician from YourMechanic will be able to inspect the system and replace the thermostat housing or sensor as necessary.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: I have a 2010 Camaro RS with an llt engine. How exactly would I take the thermostat housing off to replace the gasket & o-ring ?

The coolant pipe near thermostat cover will need to be removed for access to thermostat. If you have an aftermarket cold air intake plenum then you may have to remove upper and lower housing thermostat housing to get to the...

Q: Where is the fuel filter on. A mercury milan 2009

Hello, thank you for writing in. The fuel filter is located b,etween the fuel tank and the engine. With that being said, the filter will be on the same side of the vehicle as the gas tank, usually right behind...

Q: Why are the fans staying on when the car is off to where I have to pull the fuse?

The fans are controlled by a relay as well as a temperature switch and possibly timer(s). The relay may be stuck in the closed position and that would be the first and easiest component to test. If a relay tests...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...