Can a Bad Car Battery Cause Engine Misfire? Knowing the Truth

If the question: Can a bad car battery cause engine misfire has been influencing your thought process, the following section becomes a must read.

Engine misfires can be frustrating at times. Knowing that your engine is not delivering the intended power can give you a trouble-laden ride. Most of the time, people relate engine misfiring to bad car batteries, but is it so?

Can a Bad Car Battery Cause Engine Misfire?

When there is a problem with the ignition system of your car, it may result in an engine misfire. This implies that there may be a probable imperfect combustion process within the cylinder.

When looking for reasons for such misfires, a bad car battery is what comes to mind. Read through to find out the truth behind the same.

1. How Can a Bad Car Battery Lead To A Misfire?

You know what a fuel pump is, right? If not, then it would be interesting to know that a fuel pump is a device that aids in pumping liquid fuel to the internal combustion engine. It is the low battery of your car that can affect this fuel pump adversely.

In simple words, a low car battery can lead to slower processing of fuel pumps. This condition can further lead to “lean fuel”. 

Another thing a bad battery can lead to is the improper opening of certain injectors. All these conditions together can cause misfiring of the engine.

Explore how can a bad car battery cause engine misfire
A low car battery can lead to slower processing of fuel pumps.. (Photo: Youtube)

So the next time you wonder how can a bad car battery cause engine misfire, we hope you’ll have the answer.

         SEE MORE:

2. Consequences of Misfiring

If cylinder misfiring occurs due to bad car batteries, it can lead to damaging the engine greatly. The lean fuel condition as discussed in the above section would lead to overheating of the engine. This could further harm the valve or the piston.

Thus, you will experience a loss of power when driving. The internal components of the engine would rotate unevenly, further causing wear and tear that would become expensive to repair. 

Another thing that can be a consequence of misfiring is the emissions. Black exhausts are particularly witnessed that can reduce your carbon footprint greatly. You could also explore through maintenance tips to know more about emissions.

3. Things to Keep In Mind

A normally charged battery is inbuilt with 12.65 volts. You can check it with the help of a voltmeter

In case the reading varies to up to 12.45 volts, it should be pretty fine. But anything below that line could be a warning sign. This is where a battery replacement is required.

>> Are you looking for a Clean and Good condition Japanese Used Car? CLICK HERE NOW! <<

One should also know that sometimes even a fully charged battery could turn out to be bad due to lack of its overall output. 

This is where a conductance tester could be helpful. In a conductance tester, a frequency signal is transmitted through the battery. 

This helps in knowing as to what part of the plate is not having good conductance. The process helps in accurately knowing the condition of the battery.

Answers to How Can a bad car battery cause engine misfire
A normally charged battery is inbuilt with 12.65 volts. (Photo: Getty Images)

If all these tests produce results indicating that a battery replacement is required that should be done on priority basis. Remember to install batteries with same or higher CCA ratings and that the batteries should be fully charged prior to installation.

FAQs on Car Battery Causing Engine Misfire

  1. Can a bad battery damage the engine?

A bad battery itself is unlikely to cause direct engine damage. However, if left unresolved, the misfires it triggers can potentially lead to damage over time due to unburned fuel contaminating the catalytic converter or fouling spark plugs.

  1. How can I determine if my battery is causing engine misfires?

Start by checking the battery’s voltage and ensuring it’s within the recommended range. Additionally, have a diagnostic scan performed to identify any trouble codes related to misfires or electrical issues.

  1. What should I do if I suspect my battery is contributing to engine misfires?

If you suspect your battery is a factor in engine misfires, it’s essential to address the battery issue first. This may involve recharging or replacing the battery. After that, if the misfires persist, further diagnosis may be necessary.

  1. Are there preventive measures to avoid battery-related misfires?

Regular battery maintenance, such as cleaning terminals and ensuring a strong charge, can help prevent battery-related issues that may lead to misfires. Additionally, keeping your vehicle’s electrical system in good condition is crucial.

  1. Can other factors besides the battery cause engine misfires?

Yes, engine misfires can result from a variety of factors, including faulty spark plugs, ignition coils, fuel injectors, and sensors. It’s important to consider these components during diagnosis.

  1. Should I seek professional help if I suspect engine misfires or battery issues?

Yes, it’s advisable to consult with a qualified mechanic or technician if you suspect engine misfires or battery-related problems. They can perform a comprehensive diagnosis and recommend the necessary repairs.


Can a bad car battery cause engine misfire? Yes, it can! Though people may suggest you against it, this could be a probable reason. Getting your cars checked and replacing batteries could help you a great deal when looking for a reliable solution.