Car Trouble? Here Are The Top 5 Reasons Your Check Engine Light Comes On

by | Aug 22, 2019 | Automobile

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According to recent research, more than 9 million Americans ignore their check engine lights for 90 days or more. Though most don’t see it as a big deal, it puts their safety at risk and increases the chances of severe engine damage. The most common reasons for a check engine light (and a call for BMW repair in Chicago) are explained here.

A Faulty, Missing or Loose Gas Cap

This is a surprisingly common reason for the check engine light to come on. A gas cap prevents fuel from evaporating and it keeps your car’s fuel system at the correct pressure. If the cap is missing or broken, replace it right away.

A Failed Oxygen Sensor

This component monitors unburned oxygen and fuel levels. A broken oxygen sensor, if not immediately replaced, may cause severe damage to your vehicle’s catalytic converter.

Catalytic Converter Damage

This exhaust part turns carbon monoxide into inert compounds. With proper maintenance, catalytic converter issues are easily prevented. Low performance and diminished fuel economy are the most common symptoms of catalytic converter failure.

MAF Malfunctions

The MAF (mass airflow) sensor regulates the air going into the engine. If your MAF has failed, you may see reduced fuel mileage, starting problems, and stalling.

Vacuum Leaks

Your car’s vacuum system controls various functions. Unfortunately, vacuum hoses crack and dry out with time and exposure to the elements. A vacuum leak can easily trigger a check engine light, but they can be avoided with regular maintenance and BMW repair in Chicago.

Schedule Service Today

Driving a European car is exciting, but maintaining it is another matter. Let us take the boredom out of BMW repair in Chicago! Visit to learn more about our services or call Chicago Motors Auto Service to schedule a maintenance visit. We’ve got what it takes to keep your car on the road.

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