Skip the auto shop - Our mechanics make house calls

Q: battery light comes on about half minite after starting it

asked by on

battery light comes on about half minite after starting it

My car has 160000 miles.
My car has an automatic transmission.

A: Hello. The battery light will illuminate wh...

Hello. The battery light will illuminate when the charging system is registering out of normal voltage ranges. The computer starts running tests immediately and is detecting a problem right from the start. The battery, and alternator can be removed from the vehicle and tested at your local auto parts stores. The vehicle depends on these systems to work correctly in order to run correctly. If they fail while driving the vehicle will stall and leave you stranded. You can also have the vehicle scanned for diagnostic troubleshooting codes to see what exact reading is setting off the warning light. Use the scan results and the results from the battery and alternator test to help diagnose what is causing the warning light.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Car won't start - 1996 Ford Thunderbird

Hi there. Like any other refined product, gasoline can spoil and expire, causing problems like you're experiencing with your Thunderbird. However, sometimes other mechanical issues like clogged fuel injectors, dirty throttle body or mass air flow sensor can also cause...

Q: Engine and battery light on car lost power after driving for 5 minutes

Hi, thanks for writing in. This may be a result of a few different things such as a bad ground connection, a weak battery, a faulty alternator or potentially a failing voltage regulator. The harmonic balancer does not have any...

Q: Not starting distributor spark

Hi there. You need to see if the distributor is turning when the engine is cranking. If not, then the vehicle has a broken timing belt. I would usually check the timing belt to see if it is intact. If...

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...