Top 5 Reasons For The Check Engine Light


If you drive a car, then you must be familiar with dashboard lights and what do they mean. However, the check engine light is one of the most mysterious lights that comes without warning and no explanation.

There are multiple reason that may trigger the Check Engine Light but we have assimilated the top 5 reasons that can cause the Check Engine Light to flash on your dash.

You may not be able to fix the problem that’s causing this light to come on yourself however, knowing the problem by diagnosing the symptoms can help you become vigilant.

After reading this blog, you will be able to safeguard yourself from any sort of cheating or trickery of shady repair shops who are ready to just steal your money away for a simple quick fix.

1. Oxygen (O2) Sensor Malfunction

The O2 sensor measures the amount of unburned oxygen in your vehicle’s exhaust system.

A faulty sensor can cause damage to your spark plugs and catalytic converter. It also leads to black smoke being emitted from your car and will most likely not pass the emission test of Pollution Under Control (PUC).

Sensor Malfunction2. Fuel cap is loose or damaged

One would not believe that something as small as a loose or damaged fuel cap can cause the check engine light to come on. But, it’s true in such a scenario you will lose fuel through evaporation which is certainly not good for the car’s fuel economy.

Fuel cap

3. Catalytic converter needs replacing

A catalytic converter of a car is used to convert harmful carbon monoxide into carbon dioxide. And whenever, there is some problem with it your check engine light is triggered alerting you to look for a problem in the catalytic converter.

A faulty catalytic converter will result in reduced performance and fuel economy and your car may run at a higher temperature.

Catalytic converter

4. Mass Airflow Sensor (MAF)

A car’s mass airflow sensor is responsible to measure the amount of air entering the engine to determine the amount of fuel required to run the engine efficiently.

A faulty MAF sensor can lead to an increase in emissions, causing the car to stall, and ultimately decreasing the car’s mileage.

Mass Airflow Sensor

5. Spark Plugs or Plug Wires need replacing

Spark plugs are responsible for igniting the air/fuel mixture in the combustion chamber of your vehicle and spark plugs wires deliver the spark from the ignition coil to the spark plugs.

If any of the spark plugs or spark plug wires goes bad then you will notice a reduction in car power and poor performance. You car engine will misfire resulting in reduced fuel economy.

Faulty spark plugs or spark plug wires can also damage the catalytic converter and O2 sensor of the car leading to an expensive repair job.

Spark Plugs

Now, you know some of the most common reasons that cause of Check Engine light and how to diagnose it.

#AutomenProTip: Do not drive your car while the Check Engine Light is on. It can lead to a serious problem. Take your car to the nearest workshop to diagnose the real cause or call Automen on 8010696969 for a Doorstep Car Inspection.