Skip the auto shop - Our mechanics make house calls

Q: Battery problems, dies all the time

asked by on

The battery in my 2011 Ford Fusion has been randomly dying. I recently replaced it, but the problem didn’t go away. It takes a long time for the battery to completely die, so I'm not sure what is causing the problem. The car has less than 50,000 miles on it, so it’s not like everything is falling apart. What could be causing my battery to die?

A: Nothing is quite as frustrating as stepping...

Nothing is quite as frustrating as stepping out to start the day, putting your key in the ignition and… silence. In many cases, the solution is as simple as replacing the battery. As you have discovered though, sometimes your dead battery is only a symptom of a larger problem. In most modern vehicles, the Fusion included, systems in the vehicle are routed through a body control module (BCM) or in your case, a smart junction box (SJB). These components typically utilize a timer that prevents accessories from staying on and draining the battery. However, in some circumstances, lights or modules can remain active or “awake”, killing the battery in a relatively short period of time. Now that battery number two has not solved your issue, I would advise you have a qualified technician examine the starting/charging system to ensure you do not have a defective battery. Once the integrity of the battery has been confirmed, the technician should conduct a battery draw test. Basically, the technician will eliminate circuits one by one while watching an ammeter connected to the battery. When the excessive current draw has been eliminated, the suspect circuit can be more easily identified. Electrical problems such as this have too many variables to provide an accurate estimate of the cost to repair here. However, a competent technician can typically identify the issue within one to two hours, provided the issue can be duplicated at the time of inspection.

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: My car will not get over 20 mph. What is wrong?

The battery replacement seems to be a coincidence and has no bearing on the symptom you are experiencing. The only exception to this would be if during the battery replacement, any essential wiring was disconnected or damaged, such as the...

Q: Exhaust smell inside the cabin

Hello. Smelling exhaust fumes inside of the vehicle can be hazardous to your health, and is a problem that should be taken care of as soon as possible. Typically the air from around the engine and front of the vehicle...

Q: Which muffler should I get for a deep smooth sound?

Even with a different muffler, this engine will still have a high pitched noise like the one you are hearing. This noise is due to the valve timing changing. A muffler will be helpful in drowning out the other noise....

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 Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...