Skip the auto shop - Our mechanics make house calls

Q: Car is suffering a voltage failure

asked by on

My car is having some sort of voltage failure. My car is very easy to start with a jump or portable battery, and then I will have no problems for about 24 hours. I took the battery to be tested and it is showing as okay, though they said there might be some type of minor voltage problem.

The battery cables and connections to the engine need to be inspected. Corrosion can occur in all of these connections. Also, the alternator needs to be tested to ensure it is charging the battery. A power drain could also cause this problem. Look for lights staying on in the vehicle as well. If you need help verifying the problem, a certified mechanic, such as one from YourMechanic, can come to your home or office to inspect your charging system and determine what repairs will be 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

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 occasionally

Hello. It sounds like there may be an intermittent problem with the starter. A solenoid is located on the starter and it is possible that there is a bad spot on the solenoid that is preventing the car from starting...

Q: Door not unlocking with the remote

Hello, it sound like you have a failing left front power door lock actuator. On a lot of modern cars, there are position sensors built into the power door lock actuator, which can affect the operation of the other doors....

Q: Wont crank

Hello. A vehicle that does not crank or respond when the key is turned can be caused by a few things. The most common being a dead battery, corroded battery cables or terminals, a dead transponder key, or a bad...

Related articles

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...
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...
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...