Can a Bad Battery Throw Codes?

It’s happened to most of us. We’re driving along, the car seems to be running just fine, and then suddenly, the check engine light comes on. We panic, wondering what could be wrong with our car. But sometimes, that light doesn’t always mean there’s something wrong. In fact, it might just be bad battery throwing codes. So before you go tearing apart your engine looking for a problem that might not even exist, read on to find out more about how a bad battery can cause codes to come up.

Can a bad car battery cause computer problems?

When a battery is bad, it can’t always provide the correct amount of power to the car. This can lead to many issues that affect the performance of your car.

In some cases, a bad battery can cause problems with computers in the car and lead to incorrect error codes being thrown by the computer. This might cause the check engine light to come on, as well as other lights or systems in the car. If this happens, the car’s computer will usually set a code, which will tell you that there’s something wrong with the battery.

A bad battery will not only cause problems with the car’s computer, but it can also lead to problems with the car’s electrical system. If there is not enough power getting to your lights or stereo, they may dim and flicker when you try to use them. This can also happen if the battery isn’t charging properly, which means it needs to be replaced.

If you’re noticing any problems with your battery, such as it not starting the vehicle or having dim lights when bugs are hitting them, then check to see if there’s anything wrong with the battery. You might need to have it replaced if there’s a problem.

If needed replacement isn’t an option for you, then your best bet is to have the battery tested. You can do this at an auto parts store or a mechanic shop. Usually, batteries will be good for up to five years after they’ve been tested and deemed okay; however, it’s important to keep in mind that different brands of car batteries don’t last quite as long as others.

What are 3 signs that a battery is bad or going bad?

There are different signs of a bad battery. Here are three to look out for:

1. The battery doesn’t hold a charge for very long: If your battery doesn’t hold a charge for very long, it might be time to get a new one.

If your car has been sitting for a while and the battery is completely drained, you might not be able to start the car even if you jump-start it. This is because a bad battery can’t create enough voltage to turn over the engine.

If you’re frequently having to jump-start your car, that’s a sign the battery is going bad.

A battery that doesn’t hold a charge can also cause the alternator to work harder than it should, which could lead to an expensive repair bill.

2. The battery dies very quickly even when it’s not in use: A battery that dies even when it’s not in use might need to be replaced.

If your battery dies after only a few hours of sitting, that’s usually an indication something is wrong.

Bad batteries can also cause electrical components to work too hard. If the battery dies even when it’s not in use, you might need a new alternator, or other electrical part replaced.

3. The battery is swollen, and the case is bulging. A swollen battery might indicate a bad or leaking battery.

If you notice your battery is swelling or the case appears to be bulging, it’s time to get a new one before something bad happens.

One sign of a potentially failing cell inside the battery can be seen by looking at its electrolyte level through the plastic window on top of the casing.

If the electrolyte level is below the top of the separators, that’s an indication that one or more cells might be bad.

Batteries can also leak acid if they’re not maintained properly. If you see any evidence of leakage, including corrosion on the battery terminals, it’s time to get a new battery.

Bad batteries should be replaced immediately. This way, you can keep your vehicle running smoothly and safely.

Does a dead battery clear codes?

You might have wondered, will a bad battery throw a code? It depends on the battery and the code. Some batteries are designed to clear codes when they die, others are not. And some codes can only be cleared by a technician using a specialized tool.

However, not all batteries are created equal, and some will give false positives even when they’re still good. A technician with advanced equipment can determine whether your car’s readings are accurate or just an erroneous signal from a faulty battery.

What are the signs of a failing battery?

There are a few key signs to look out for when you think your battery might be failing. One sign is if your car won’t start, even if it’s been sitting for a while and the engine is cold. Another sign is if your car struggles to turn over when you try to start it. And finally, if your dashboard lights up with warning symbols or messages about the battery, that’s another clue that something might be wrong.

If you’re experiencing any of these symptoms, it’s best to have the battery tested by a professional to find out for sure whether it needs to be replaced or not.


A bad car battery can cause all sorts of electrical problems because it creates an unstable electrical environment. To determine if this is what’s going on, it’s important to have a trained professional diagnose the vehicle. It’s always best to keep your car battery in good condition by regularly testing it and replacing it when necessary.

If you start seeing any signs of a failing battery, it’s time to get a new one. A bad battery can be prevented if detected and replaced in time. It is always better to be safe than sorry. Get a new battery before it causes a bigger problem.

About the author, Phil Borges

Phil Borges is a battery aficionado. He's written extensively about batteries, and he loves nothing more than discussing the latest innovations in the industry. He has a deep understanding of how batteries work, and he's always on the lookout for new ways to improve their performance.