Skip the auto shop - Our mechanics make house calls

Q: Batteries at 13v go dead after trying to start it

asked by on

The batteries are reading 13 volts hard start it sounds like they don't have enough voltage in them to start the truck then after I try and start it they read 8 volts

My car has 130000 miles.
My car has an automatic transmission.

You need to have the battery charged and load tested. A battery may hold 13 volts and as soon as a load is put on it drop below 9 volts when they are bad. If you want to have this done, a technician from YourMechanic can visit you at your car’s location to diagnose your starting issue and make the correct repair.

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!
  1. Home
  2. Questions
  3. Batteries at 13v go dead after trying to start it

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: Can I replace a leaky radiator with a used one or should I get a new Ford radiator?

Hey there, thanks for writing in about your 2008 Ford F-350. I would check to see if the radiator is available aftermarket first. I would not go with a used one, since you never know what you will get. If...

Q: Electrical fault

Getting your car broken into is a pain! Often the thieves do thousands of dollars of damage to your car to steal a hundred dollars worth of stuff. It can take a long time to sort everything out. It sound...

Q: Oky so everytime i try to start my car it makes this big loud clanking noise consistently on going when i try to start the car

I would need to hear the noise to be sure but when cranking the engine can only be one of two things. This could be the starter drive going bad or the flywheel has teeth worn or missing. Make sure...

Related articles

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...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.