Why did my car shut off while driving and won’t start?

Why did my car shut off while driving and won’t start?

Are you driving along and suddenly your car shuts off for no reason? This can be an extremely stressful experience, as it often means the vehicle needs expensive repairs. A failed engine, fuel shortage, alternator failure or battery malfunction are some of the most common causes of a car shutting off while in motion.

While these scenarios can seem daunting at first, there are some steps that can help diagnose potential problems so you can start to get back on the road again soon. Read on for more information about why your car might have shut down in the middle of driving and what steps to take next.

Out of Fuel

One of the most common causes of a car shutting off while in motion is running out of fuel. If you’re driving on empty and don’t have enough fuel to power the engine, then your car will shut down until more fuel can be put in it.

To prevent this from happening, make sure you check the gas gauge regularly and fill up when needed. If you find that your car is running out of fuel more often than usual, check for any signs of a fuel leak, as this could be why the tank isn’t staying full.

Fuel Pump Issue

Another possible cause for a car shutting off while in motion is a faulty fuel pump. This part of the engine helps to get fuel from the tank into the engine, so if it’s not working properly, then you could experience your car stalling. Common signs that indicate a bad fuel pump include uneven acceleration, trouble starting and sputtering when driving.


In this case, you’ll need to have a mechanic inspect and replace the fuel pump if necessary. Make sure to get professional help as soon as possible to prevent further damage to your engine.

Faulty Ignition Switch


The ignition switch is another potential cause of a car shutting off while in motion. This part of the vehicle controls the flow of electricity from your battery to your starter, so if it’s malfunctioning then you could experience stalling due to lack of power.

If you notice trouble starting or strange noises coming from your engine, then it could be worth checking if the ignition switch needs replacing.

Low Charge Alternator


Low charge alternator can also be the reason for your car shutting down while in motion. The alternator is responsible for keeping the battery charged and supplying extra electricity to power components like headlights or air conditioning.

If the alternator isn’t able to keep up with demand, then you will experience power loss which can cause your vehicle to shut off. Any signs of warning lights or strange noises coming from the engine should be investigated by a mechanic as soon as possible.

Defective Car Battery


A bad car battery can be another cause of your vehicle shutting down while driving. The battery provides electricity to the starter which starts the engine, so if it’s not working properly then you could experience difficulties starting or stalling on the road.

The most common symptom of a failing battery is trouble starting the car in cold weather. If this is the case, then you should have a mechanic check your battery and replace it if necessary.

Incorrect Signal Sensors


In some cases, your car shutting down while in motion can be due to wrong signal sensors. This can be especially true if you have an older model vehicle, as the sensors can become worn out over time and no longer provide accurate signals to the engine.

Signs that indicate faulty signal sensors include frequent stalling, hesitation or trouble starting the engine. If this is the case, then you should take your car to a mechanic for further inspection and potential repair.

By taking the time to investigate why your car shut off while driving and won’t start again, you can be prepared for any potential repairs that may be needed. With some basic troubleshooting or professional help from a mechanic, you can get your car back on the road in no time.

How to fix a car that randomly dies while driving on street?

Here are steps to check and fix a car that randomly dies while driving on street without mechanic :

  1. Check if the ignition is turned off – The first thing you should do is make sure that your ignition switch is in the “on” position. If it isn’t, then turn it back on and see if this helps to get your car running again.
  2. Check for fuel supply – Make sure that there’s enough fuel in the tank to power your engine. If you’re low on fuel, then filling up should get your car running again.
  3. Check for spark – Make sure that your spark plugs are all working properly and that they’re getting a good connection to the battery. If any of them seem worn out or corroded, replace them and this should help to get the engine running again.
  4. Check for air intake – The air filter is important for supplying oxygen to the engine. If there’s something blocking it, then this can prevent proper airflow which will make your car stall out. Inspect the filter and replace or clean it if necessary.
  5. Check the battery – A failing battery can prevent your car from starting, so make sure to check for any signs of corrosion or cracked wires which could indicate a problem. If the battery is dead, then get it replaced by a professional.

By following these steps, you should be able to identify and fix most common causes of a car randomly dying while driving. However, if the issue persists, then it’s recommended to take your vehicle to a mechanic so they can inspect and repair the problem.

How can we reduce car emissions while driving?

Proper maintenance is the key to preventing a car from dying while in motion. Here are some tips to help you minimize this issue:

  • Regularly check oil levels and top off if necessary.
  • Change your spark plugs, air filter and fuel filter on a regular basis.
  • Get your battery tested every 3 years or so.
  • Make sure to fill up the gas tank with high-octane fuel when needed.
  • Bring your car in for regular tune ups and maintenance checks.

Diagnose the vehicle

To diagnose and address vehicle issues, follow these steps:

  1. Obtain a scan tool and locate the OBDII diagnostic port positioned beneath the steering wheel.
  2. Establish a connection and start the vehicle to retrieve registered codes.
  3. Some advanced scan tools offer error code explanations, including potential causes. However, with a budget-friendly scan tool, online searches for specific code interpretations may be necessary.
  4. Armed with this information, proceed to resolve the problem. For instance, trouble codes like P0340, P0341, P0342, P0343, P0344, P0345, P0346, P0347, P0348, and P0349 typically indicate issues with the camshaft position sensor, such as malfunctions, imprecise readings, or lack of voltage.

Check the fuel pressure

When dealing with stalling and no-start issues, you should check the fuel pressure. A malfunctioning fuel pump or a blocked fuel filter are two primary causes of this problem.

To check the fuel pressure, start the engine and use a gauge in conjunction with a special fitting at the end of the fuel rail. If it shows that the pressure is too high or low, the same gauge can be used to measure fuel pressure while the pump is running.

Ideally, the fuel pressure should measure between 40 to 46 PSI. If it falls below the specified PSI for your vehicle, it indicates a problem with the fuel pump. In such cases, it is recommended to replace the pump with a new one rated for 46 PSI or the specified PSI for your car. If this does not resolve the issue, it is advisable to seek assistance from a qualified mechanic to conduct a thorough diagnosis.


Can low oil cause a car to shut off?

Yes, low oil can cause a car to shut off as it stops lubrication of the engine components. When this happens, you may experience issues with starting or stalling your vehicle. It is important that you check and maintain your vehicle’s oil levels in order to avoid such issues.

What should I do if my car won’t start after shutting off while driving?

If your car won’t start after shutting off while driving, it is important to diagnose the cause of the issue first. Check for fuel supply, spark plugs, air intake and battery condition, as these are common causes of the problem. If you are unable to identify and fix the issue yourself, seek professional help from a mechanic. They will be able to diagnose and repair the issue quickly.

What are the signs of a bad spark plug?

The most common signs of a bad spark plug include engine misfiring, sluggish acceleration, difficulty starting the engine and poor fuel economy. Additionally, you may also notice reduced power or rough idling. In such cases, it is important to inspect your spark plugs for any signs of corrosion or damage and replace them as needed. Regular maintenance of the spark plugs is essential to keep your car running smoothly.

What is the purpose of a fuel filter?

A fuel filter is an important component that helps to ensure clean fuel delivery and overall engine performance. It prevents dirt, debris, and other contaminants from entering the engine and clogging up its components. The fuel filter should be replaced every 25,000 to 30,000 miles or as recommended by the vehicle’s manufacturer. Failure to do so can lead to reduced engine performance and higher fuel consumption.


It can be terrifying when your car shuts off while in motion. If this happens to you, there are most likely a few potential causes such as an engine failure, fuel shortage, alternator failure or battery malfunction. However, with some basic steps and research, you should be able to diagnose the problem and work on getting back to your destination soon.

If you want more help pinpointing problems with your vehicle or understanding your repair options once the cause of your breakdown is found, consult a professional mechanic for advice today. We hope this post has been useful to providing information about why cars tend to shut off randomly and what steps owners can take. If you have any additional questions or insights into this issue, please leave a comment below, Weaversautocenter would love to hear from you!

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