Check Engine Light Flashing – 12 Possible Reasons Behind!

Written By: Terrence Hines
Category: Engine

If you start to notice your check engine light is flashing, it’s important not to ignore it- it could be an indicator of a much bigger problem.

Proactively identifying and addressing issues sooner rather than later will save you time and money in the long term, so don’t hesitate to jump on it!

Check Engine Light Is Flashing – 12 Possible Reasons Behind!

If your check engine light is flashing, it is important to take the necessary precautions and investigate why.

When you notice this, it typically indicates a fundamental issue with one of your car’s parts that necessitates prompt attention.

Depending on the severity of the issue, it could be something as simple as a loose gas cap or something as problematic as an overheating engine.

Ultimately, you should take your car to a certified mechanic as soon as possible for a proper diagnosis and repair.

Investing a small amount today can save you from spending more on definitive repairs later. So don’t wait until it’s too late; take action now and protect your future investments.

But first of all, you have to be enough knowledgeable to know the reasons behind, so here are some most common ones.

1. Engine Is Running Too Hot:

When your check engine light starts flashing, it could mean many things- one of them is that your engine is running too hot.

Check Engine Light Is Flashing - 12 Possible Reasons Behind!

The implications of this are staggering: you can jeopardize your engine, reduce its performance and fuel efficiency, or leave yourself stranded on the highway.

If you don’t perform the necessary maintenance checks, all these risks will likely arise!

It’s important to take action right away by addressing any issues as soon as possible. First, listen to your car – check under the hood, check oil levels, and check hoses.

If in doubt or if you don’t have time to check it out yourself, head straight to the mechanic so they can troubleshoot and diagnose what’s wrong with your vehicle.

Don’t neglect the warning signs – check engine light flashing could be flagging something serious!

2. The Fuel Injection System Needs To Be Checked:

Regularly checking your vehicle’s fuel injection system is always a good idea. It can help keep you safe and prevent long-term damage to the car.

Especially if you notice that your check engine light is flashing, you should check the fuel injection system – it could indicate a problem with the fuel being delivered to the engine.

A thorough checkup of your vehicle’s fuel injection system will identify any current issues, as well as any potential problems that may arise in the future.

Taking care of these problems before they become severe will save time and money in the long run, so check your fuel injection system today.

3. Ignition Coil Needs To Be Tested Or Replaced:

Driving with a faulty ignition coil can be dangerous and problematic.

It is sometimes accompanied by the check engine light flashing on your dashboard or other engine troubles such as poor performance, misfiring, or difficulty starting.

If this issue is present, you should immediately inspect the ignition coil.

An experienced mechanic can assess and evaluate the ignition coil to find out if it has to be replaced – in some cases, only a few elements of the coil must be modified instead.

Remember that while replacing the entire coil is easier, detecting and fixing the problem areas can save you time and money in the long run!

4. Your Car Needs An Oil Change:

If you’ve noticed your check engine light flashing or your car is not running as smoothly, it is likely time for an oil change.

Your Car Needs An Oil Change

When the oil in your car becomes old and worn out, the check engine light may turn on as a warning that something needs to be addressed.

An oil change should be scheduled soon after this occurs, as it will help protect the engine from further wear and tear and ensure that it runs optimally for years.

Check the owner’s manual for guidelines on how often an oil change is recommended, or ask a professional mechanic for assistance.

5. The Air Filter Needs To Be Replaced:

Replacing the air filter in your car should always be a priority for any driver; however, if you notice that the check engine light is flashing, it’s even more important to check and potentially replace it.

As part of your regular maintenance plan, it is important to check the air filter – doing so routinely will help prevent any issues that might arise due to a dirty or clogged air filter.

This ensures optimal airflow into your engine’s combustion chamber and keeps everything running smoothly.

A clogged or dirty filter can reduce fuel efficiency, increase emissions, and damage other engine parts, so it’s worth replacing when necessary.

6. You Need A New Set Of Spark Plugs:

If your check engine light is flashing, investing in a new set of spark plugs might be time.

Spark plugs wear out over time and often must be replaced every 30,000 miles. Replacing them can improve engine performance and reduce the risk of costly repairs.

Staying on top of your car maintenance is necessary for optimal performance, so don’t forget to check and replace spark plugs regularly!

Doing so will extend your engine’s life and ensure you can get wherever you need it!

7. You’re Low On Engine Coolant:

If the check engine light on your car is suddenly flashing, this could indicate that you’re running low on engine coolant.

Coolant helps regulate the temperature of your vehicle’s engine, so it’s important to check this fluid level immediately for any signs of depletion.

If your engine coolant is low, add more coolant as soon as possible to help prevent any long-term damage to your vehicle’s motor.

Look for potential signs of coolant loss, such as vapor emanating from beneath the hood, puddles of colored liquid, or white smoke coming out of the exhaust pipe.

Check Engine Light Is Flashing

Check your coolant levels regularly to keep your engine running smoothly and efficiently!

8. You’re Running Out Of Gas:

If you check your gas gauge and realize your tank is running low, acting quickly and responsibly is important.

Before you come to a full stop, check the check engine light: if it’s flashing, your engine needs oil and possibly other maintenance.

Stop at the nearest appropriate place – not a deserted street – so you can refuel and check in with a professional mechanic as needed.

While running out of gas isn’t ideal, remaining vigilant and proactive will help ensure you stay safe on the roadway.

9. You Have A Broken Fan Belt:

Discovering an issue with your car can be frustrating, like when you have a broken fan belt. Commonly, this is easy to spot as the check engine light will flash as soon as it happens.

Therefore, it’s important to react quickly and immediately check out your car when you notice this warning sign.

While the check engine light is flashing, your vehicle is at risk of further damage, so it’s best to sort the problem out before it leads to bigger problems.

It might require a professional mechanic or even just replacing the fan belt for your car to be back up and running.

10. You Have Low Oil Pressure:

Has your vehicle’s check engine light been flickering? It may imply that you now have a low oil pressure issue.

Low oil pressure can be problematic as it will not only wear down the parts of your engine more quickly but can lead to a significantly increased risk of total engine failure.

To check the levels, check the dipstick and ensure enough oil is in your vehicle before further exploring.

If levels run too low, adding more oil to your vehicle should be approached carefully and cautiously, as overfilling the tank can lead to extensive damage and require costly repairs.

11. There’s An Issue With Your Emissions System:

Driving down the highway, you glance down and see that your check engine light is flashing – a possible warning that there’s an issue with your emissions system.

Don’t delay in inspecting your vehicle’s emission control system. When not functioning properly, it can cause your car to slow down and use up more fuel.

There's An Issue With Your Emissions System

Additionally, it could lead to environmental hazards that we must all work together to prevent.

If you see your check engine light flashing, check out the issue to ensure all of your car’s systems are running as they should be.

12. You Have A Loose Or Missing Gas Cap:

Constant check engine warnings can be both inconvenient and alarming. For example, when you have a loose or missing gas cap, this check engine light will start flashing.

If your car is equipped with On-Board Diagnostics (OBD), your check engine light indicates that the gas emissions system is malfunctioning and must be addressed immediately.

Ensure a snug fit of your gas cap and keep an eye out for any signals from the check engine light.

If the warning keeps appearing after two weeks, contact a professional mechanic to look into it further. But don’t wait until it’s too late. Check your gas cap today!


It is important to check what could be wrong if the check engine light is flashing in your car.

There could be multiple possibilities causing the check engine light to come on, and a qualified mechanic should check the vehicle to diagnose and repair any problems correctly.

Ignoring these warning signs can worsen the situation, so addressing it swiftly before further damage is incurred is best.

It may be a minor problem that can easily be fixed, but ensure you check your check engine light as soon as possible.

Terrence Hines

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