Battery draining

2013 CHEVROLET MALIBU
119,000 MILES • 2.5L • 4 CYL • 2WD • AUTOMATIC
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LUTHERCHAT
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Few days ago my battery started running low after parking it over night. The alternators work fine. When I finally jump start it, it works the whole day and when I check the battery before I park it, it shows me 13.7. In the morning it goes down to 11.5 and cannot crank the vehicle. I dont know if it has anything to do with the PCM because I always get that that error code all the time.
Dec 16, 2020 at 4:08 PM
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KTECH
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Go to your local major auto parts store and have them do a free in-car test of your battery. This would be a quick way of checking the life of the battery. Batteries typically only last maybe 3-5 years, sometimes less depending on extreme temperatures hot and cold. The main function of the battery is to start the car, then the alternator takes over. It may be time for a replacement. good luck and let me know if I can help in any way
Dec 16, 2020 at 5:11 PM
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DANNY L
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Hello, I'm Danny.

You might want to see if the battery cables are clean and tightly connected. If they are you might want to have your battery load tested at an auto parts store. That will tell you the condition of the battery. Here are a few tutorials for you to view relating to batteries:

https://www.2carpros.com/articles/how-a-car-battery-works

https://www.2carpros.com/articles/everything-goes-dead-when-engine-is-cranked

https://www.2carpros.com/articles/car-battery-dead-overnight

https://www.2carpros.com/articles/car-battery-load-test

Hope this all helps and thanks for using 2CarPros.
Dec 17, 2020 at 10:38 PM
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LUTHERCHAT
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Thanks. I already fixed it. I had a noco genius battery charger and I used it. Noticed that the port where I plugged the phone charger doesn't turn off with the engine. It keeps running for a long time before it turns off. So I unplugged everything in my car and also turn of the A/C when I park the car and it stopped discharging. Thanks everyone for your encouragement.
Dec 17, 2020 at 11:58 PM
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DANNY L
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You're welcome!
Glad to hear you've solved the problem. Thanks again for using 2CarPros and hope you will use our site again in the future.

Danny-
Dec 18, 2020 at 1:11 PM