5 Most Common Causes of Check Engine Light On

5 MOST COMMON CAUSES OF CHECK ENGINE LIGHT ON

With modern cars, the only way to know the real reason for the light is to connect the vehicle to a diagnostic reader that provides a code indicating the most likely cause of the problem.

Here are 5 most common reasons for Check engine light:

Bad Oxygen Sensor:
Oxygen sensors measure the amount of unburned oxygen in your exhaust. If left unattended, your car will burn up to 40 percent more fuel, and you could end up damaging the catalytic converter.

Gas Cap Problem:
This should always be the first thing you check. A loose or damaged gas cap allows air into the fuel system, preventing the engine from being completely efficient.

Damaged Catalytic Converter:
The catalytic converter is an environmental control system reducing pollution by changing carbon monoxide to less harmful carbon dioxide. Damage usually occurs from ignoring necessary maintenance and repairs. If not replaced, your vehicle won’t pass an emissions test, and there will be reduced fuel economy and performance.

Bad Mass Airflow Sensor:
This part measures the amount of air coming into your engine to determine the proper fuel/air mixture. If you ignore this problem, it can damage the oxygen sensor and the catalytic converter.

Worn Spark Plugs and Coils:
The coils and plugs deliver the spark that ignites the fuel inside cylinders of your car’s engine. If they aren’t working right, your engine will not perform at peak efficiency. Ignoring this problem can cause damage to other systems.

Conclusion
Since you can’t diagnose most of these problems, when the check engine light comes on, you should take your vehicle to an Automobile workshop for a proper diagnosis.