Reasons Why Your Check Engine Light Is On

April 1, 2022 Published by Leave your thoughts

What can be the issue when your check engine light is on? You can find your car in such a situation. Tracing the issue earlier can help you avoid a serious problem and it’s also a sign you should visit a mechanic. Whenever you find your check engine light on, here are some of the indicators.

Replace Your Oxygen Sensor

The sensor is used to monitor the air-fuel mixture and it’s responsible for controlling the amount of fuel in the engine. If it’s not working correctly, the car could be consuming too much or too little fuel. Hot exhaust gases can activate the oxygen sensor. A mechanic will examine your car’s computer to see if there’s a problem with your oxygen sensor.

Issue With the Ignition Coil

Ignition coils are responsible for generating enough energy to spark plugs. If the ignition coil isn’t functioning properly, it can cause misfires and turn on your check engine light. The ignition coils are usually located near spark plugs and activated by power from the ignition system.

Your Catalytic Converter Is Failing

Failing catalytic converters are common triggers of check engine lights. A catalytic converter works by converting harmful emissions from the exhaust system into less harmful emissions before entering the air. If your catalytic converter fails, it will cause problems with your car’s fuel efficiency and turn on your check engine light. Your mechanic can easily fix this problem by replacing the catalytic converter.

Mass Airflow Sensor Needs Replacement

This sensor sends information on the air amount entering your engine to your car’s computer, adjusting the air/fuel mixture accordingly. If a mass airflow sensor isn’t functioning properly, it can cause misfires and turn on your check engine light. The mass airflow sensor is usually located in front of the throttle body and activated by a vacuum hose in the intake manifold.

Faulty Spark Plugs

If you have faulty Spark Plugs, you may be seeing the error "The engine is having trouble starting." You may also be getting an information message like "The car is laden." It’s essential to know the problem with your spark plugs so you can try to fix it. You may need to replace the plug, pull the car for evidence of ownership, or take the car to a mechanic. If the problem with your spark plugs is due to fuel economy, you may want to consider using a fuel-efficient car.  

Your Distributor Cap or Coil Is Failing

A distributor cap is responsible for distributing electricity from the ignition coil to the spark plugs. A distributor cap has an ignition coil inside it, and it also contains wires that connect to spark plugs. If you experience a "no spark" situation, the distributor cap or coil may be failing. This can cause a "No Start" situation and be fixed by replacing the distributor cap or coil.

Your Gas Cap Is Loose or Faulty 

With a faulty or loose gas cap, the engine may not be able to create a seal. The engine may run out of gas by running too lean. A mechanic can easily fix this problem by tightening your gas cap.

Why is it important to check on my check engine light? If this is your question, M & M Tire & Service Center experts will help you sort out the issue!

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