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When the check engine light turns on, most drivers aren’t sure what to do. While it indicates that you should check the engine, it doesn’t tell you what you should look for. You should have the vehicle inspected by an auto repair technician to determine the issue. While there are many possible causes, they might find the following problems.

Why Does the Check Engine Light Turn On?

1. Faulty Spark Plugs

Your vehicle relies on properly working spark plugs to deliver electricity to the combustion chamber. When the plugs are damaged, your car might not start after turning the ignition. Faulty spark plugs can cause more frequent gas fill-ups and rough idling while at stop signs and traffic lights. 

2. Mass Airflow Sensor Issues

Most car engines come equipped with systems that monitor air intake. Known as the mass airflow sensor, it’s vital for allowing vehicles to adjust to road and altitude changes for efficient driving.

The check engine light may come on if the mass airflow sensor isn’t able to measure how much air is channeling into the engine. As a result, your car might stall and suffer from lower gas mileage. 

3. Loose & Damaged Gas Cap

auto repairIf your gas cap isn’t on securely, gasoline fumes may escape from the fuel tank, which can affect the vehicle’s driving performance. Damaged or worn gas caps may not provide the proper seal to prevent fuel fumes from escaping. If the check engine light remains on after filling up and tightening the gas cap, take your vehicle in for a complete inspection. 

4. Vacuum System Leaks

From reliable brake operation to safe fuel delivery, your car’s vacuum system performs a wide range of essential tasks. If issues occur with the system, you may start to notice random surging when your vehicle idles. 

Leaks caused by cracked or dried-out vacuum hoses are often the culprits. There may also be damaged connections somewhere within the system. The best way to pinpoint the problem is to have the vehicle checked by a professional auto repair technician.  

 

These are just a few reasons why the check engine light may come on in your car. Olston’s Import Auto Repair in Lincoln, NE, specializes in complete and computerized diagnoses to identify vehicle performance issues. If your check engine light has come on, stop by the shop for a thorough inspection. Call (402) 467-2397 with your questions, or visit the website for the available lineup of auto repair services.

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