Skip the auto shop - Our mechanics make house calls

Q: Battery dies if the car sat for over 20 hours

asked by on

Since I purchased the car, I had to get the battery replaced over ten times. It just keeps dying. I had the battery load-tested and it checks out fine as well as the alternator. However, each battery dies if a day goes by that I don't drive the car. I was told that I had to drive it every day so as to prevent the battery from getting drained. There are no dash warnings nor error codes. Only the MAP light that occasionally comes on and won't turn off the car even when the engine is off. What could be causing the battery to die out so quickly?

A: Batteries that drain overnight are common. ...

Batteries that drain overnight are common. Usually when this occurs, there is a parasitic drain on one of the car's systems. When this occurs it drains the battery down over time. Batteries that are drained down repeatedly can cause them to fail. The most common causes of the battery drain are aftermarket accessories, radio, power windows and seat motors. If you can find the cause of the parasitic drain, a certified mobile technician from YourMechanic can come to your car's location to diagnose your battery and determine what should be done.

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・Save up to 30%

Get a quote

What others are asking

Q: How do you turn on the map lights?

Your car is equipped with two map lights located in the front of the vehicle, ahead of the rearview mirror. They provide limited illumination for specific tasks. Here’s how to work them: Locate the map lights. If your car...

Q: Creaking Sound coming from passenger front side when driving

Hello. A creaking sound can be caused by a wide variety of issues. A few common causes are worn suspension components or bushings. The first thing I would do is try to identify where the noise is coming from, and...

Q: How to disconnect the factory alarm box

Hi, thanks for writing in. The factory alarm system is integrated into the modules of the vehicle and cannot be bypassed. If they could, then this would defeat the original purpose to stop theft of the vehicle. You will need...

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 Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...