Skip the auto shop - Our mechanics make house calls

Q: Car has sulfated battery - 2006 Mercury Milan

asked by on

I tried to start my car and it sounded like the battery had died. My neighbor took a quick look at it and he said it looked like I have a ‘sulfated’ battery. As I understand it, that is the blue flakes around the positive connection. Wearing a glove, he tried scraping away the crud and it did slowly start, so I won’t have to get a tow. Should I take his suggestions to finish the maintenance or should I take it to the shop and have them install a new battery?

Hello. The battery and battery cables need to be evaluated at this point. Check the two terminals. If corrosion has begun on one area, the other areas around there will likely follow. If the tips of the battery cables are corroded, there’s a strong chance it goes up inside the wire conduit and will need to be cleaned off.

The battery terminals will need to be cleaned off, and if the battery posts are not clean, they will need to be cleaned as well. With perfectly clean terminals, posts, and cables, reevaluate the the status of your battery. If it holds a charge and works, you do not need a new battery. If it continues to give you trouble, then you will then need to replace the battery. If you would like to have this taken care of for you, have a certified technician from YourMechanic come to your car’s location to inspect the system and replace the battery if 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: Service AdvaceTrac Warning Light is on in my car

Your car is equipped with wheel speed sensors at each of the four wheels which monitor wheel speed while relaying this information constantly to the ABS and traction control system which are controlled by the car's ECU. When the ECU...

Q: My car won't start but does make noise

Hello there, many common faults will cause your 2008 Toyota Yaris to crank but not start. The most likely is the battery, fuel pump, battery terminals, starter, battery cables, ignition switch, or a wiring harness fault. A qualified Technician such...

Q: How do I replace the headphone batteries?

Replacing the batteries in your vehicle’s headphone set is very easy. Locate the battery compartment, which is on the left ear cup. Slide off the battery cover. Carefully remove the dead batteries. Replace the batteries with two new AAA...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...