HomeMobile Mechanic's CornerCommon Reasons Why Your Car Won’t Start

Common Reasons Why Your Car Won’t Start

It’s been a long day at work and you head over to the parking lot ready to drive home to a delicious home-cooked meal. The only problem is your car wouldn’t start.

Today’s world is filled with technology and it has made it much easier for the modern car owner to monitor their vehicle. Nonetheless, the problem of not starting the vehicle is still quite common.

Cars back in the day are mostly the same for the cars of today. They come with an internal combustion engine that powers the cars. To keep the car running, it mostly needs fuel, a spark and air. If any of these are lacking or faulty, the car is very unlikely to start. Here’s a list of the common reasons why your car won’t start.

Dead Battery

The most common reason why your car won’t start is due to a dead battery. Actually, your battery isn’t really dead, it’s only too weak that it can’t power up your starter to turn fast enough to start.

Not having enough power on your battery can be caused by a lot of things. You may have left the light on for too long, the cables might be restricting the flow of power, there might be water inside causing poor conductivity or your battery is really old and already worn out.

To confirm that the battery is really the main cause of the problem, you can jump-start your vehicle. If it works, then your battery really needs to be replaced.


The alternator plays an important role in charging your car’s battery. It is possible that the problem lies on the alternator itself but the problem can also be due to a worn accessory belt drive. If the problem lies on the belt, it is quite common for a warning light to turn on.

On the other hand, you should manually check the voltage of your alternator. Make sure it’s at around 14 volts. Some cars have alternator gauges but more modern cars don’t. You just have to ask the technician to check.


The starter gets everything moving to start the engine. A broken starter is usually accompanied by a clicking sound. Sometimes the starter is functioning well but has lost its teeth, which is why it cant’ start the engine.

car won't start

Spark Plugs

Spark plugs should be regularly replaced at around 100,000 miles. Many car owners tend to forget to replace it during their maintenance schedule. This leads to a very common problem of not being able to start the car. If only the regular replacement schedule is met, this problem can be easily avoided.

Air Filter

The air in your vehicle isn’t only limited to the air conditioning. In fact, your vehicle’s engine wouldn’t run when there is no air. Air or oxygen is needed to continue burning the fuel that keeps the car running.

Dirt, dust, grease and other buildups can cause a block on your air filter. This can hinder the proper flow of filtered air into your engine. The air filter can easily be replaced and most automotive supply shops have them.

Fuel Filter

Similar to the air filter, the fuel filter is also important in making the car run because it removes unwanted muck to get access to your engine. A clogged fuel filter would also mean lesser fuel will get to your engine. Fuel filters should also be regularly changed to avoid problems.

car won't start

No Fuel Reaching The Engine

Even if your fuel filter is clean, if the pump that pushes fuel towards your engine is weak, the fuel would still not be able to reach the engine. Similarly, if your fuel tank is empty, your car won’t start. An empty fuel tank isn’t hard to miss because there is a gauge in the dashboard.

Steering Wheel Lock

When you can’t start your car because you can’t even turn your keys, then a locked steering wheel is likely the culprit. This is an anti-theft feature and you can unlock it by steering the wheel to the left or right as you start the car.

Electronic system

Today’s technology has made it possible for keyless lock remote starting. Although it’s a cool feature, this can also cause your car to fail to start. The electronic systems should be well maintained or else they can cause errors such as this. Whit this kind of problem, you really need to call on a professional for help.


Sometimes, finding a solution to a car that won’t start is easy but sometimes you may need a mechanic’s help. If you’re unsure about what to do, it is best to wait for a mobile mechanic rather than try to do it on your own. DIY style repairs can be dangerous not only for you but for everyone on the road.

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