Want To Know What Is the Most Common Reason for the Check Engine Light To Come On?

Most drivers want a reliable vehicle to get them from point A to point B. How is that possible, you ask? With regular engine service! But there may come a time that you see the “Check Engine” light illuminate on the instrument panel. This could be the first warning sign of potential engine problems. Be sure to head to your auto shop and ask for a diagnostic test so your mechanic can check out what is happening under the hood. A problem can be diagnosed and managed while it is still small—before it turns into a major engine repair.

If you’re wondering what is the most common reason for the check engine light to come on, here is a list of things that you will want to take note of. The problem could be as simple as a loose gas cap or something more serious.

  1. Damaged Gas Cap – If the gas cap is loose or cracked, fuel vapors leak out and can throw the whole fuel system off, reducing gas mileage and increasing toxic emissions.
  2. Faulty Oxygen Sensor – The oxygen sensor monitors the unburned oxygen from the exhaust and how much fuel is burned. A faulty sensor cannot send the correct data to the car’s computer, which will reduce gas mileage and increase toxic emissions.
  3. Failing Catalytic Converter – The catalytic converter reduces exhaust gases by converting carbon monoxide and other harmful materials into harmless emissions. If it goes bad, gas mileage decreases, and your car loses power.
  4. Faulty Mass Airflow Sensor – The mass airflow sensor tells the car’s computer to add the proper amount of fuel based on the air coming through to the engine. If it becomes clogged, toxic emissions will increase, the car will start to stall, and gas mileage will decrease.
  5. Dirty Spark Plugs and Wires – The spark plug seals the combustion chamber, provides a gap for a spark to jump across, and initiates combustion in your engine. You may start to experience starting problems.

How do you prevent a significant engine repair? Take care of all the engine maintenance items as recommended by the manufacturer.

Want to know more about the most common reason for the check engine light to come on? Contact our ASE-Certified Technicians at Toledo Tire and Auto Care—Monroe Street for more engine repair information and schedule an appointment. Our auto shop is proud to serve vehicle owners in Toledo, OH, and the surrounding areas.