Skip the auto shop - Our mechanics make house calls

Q: Car keeps dying even though I jump it and the battery is less than a year old

asked by on

car keeps dying. Less than year old battery. Give car a jump. Car starts and drives maybe a mile and dies while driving. Keeps repeating.

A: Hello. This is not caused by the battery mo...

Hello. This is not caused by the battery most likely. The alternator may not be charging the battery and, after you jump start the battery, if the alternator is not recharging it, then the battery may be able to only keep the engine running for a few minutes before running out of power. You will need to have the battery completely recharged and load tested to make sure it is working properly even though it is only a year old.

Once the battery is recharged, then the alternator should be tested to see if it is charging normally. This is done with a battery/charging system tester or voltmeter with an amp probe. The alternator should be putting out about 13.5 volts and 80% of the rated amps output that it is rated at when the engine is running at 1500 RPMs. You should have an alternator rated at between 75 and 100 amps. This means if you are not getting over 60 amps output then the alternator needs to be replaced.

I recommend having a certified mechanic, such as one from YourMechanic, come to your location to determine why the battery will not hold a charge and replace the alternator if needed.

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: Car wont start and the battery is great.

Hi there. Check the throttle position sensor on the throttle body and see if the sensor is working properly. The sensor is common to fail and cause the engine to not restart. I recommend replacing the throttle position sensor and...

Q: Clicking sound when starting

The rapid clicking is generally an indication of a battery that is either drained or going bad. The battery will need to be charged and load tested to determine whether or not it is good. If the battery tests good...

Q: I'm looking at buying a fusion and it sounds like it has a bad power steering pump. Could it be anything else?

Hello, thank you for writing in. The first thing to do is check the level of the power steering fluid. If it is low then you may just need to add some fluid to quite down the system. If it...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...