Merrillville and Schererville Auto Repair

Operating Hours: Mon - Fri: 8:00 AM - 5:00 PM
Operating Hours: Mon - Fri: 8:00 AM - 5:00 PM
Operating Hours: Mon - Fri: 8:00 AM - 5:00 PM

5 Things That Can Cause Your Check Engine Light to Come On

Most drivers fear the check engine light, and it can come on your dashboard as a surprise for many reasons. Whenever you encounter this notorious yellow light, it's important that you have an automotive professional that you can count on to perform diagnostics and help you get down to the bottom of the problem. Staying informed about the check engine lights and what can cause them can save you from the stress and panic that often ensues most drivers. Here are five things that can trigger your check engine light to come on:


The oxygen (O2) sensor has the crucial function of measuring the amount of oxygen within your exhaust system. If your car is drinking up more gas than usual, you should have this sensor inspected.


The catalytic converter is an exhaust system component that helps turn toxic fumes into less harmful, breathable ones. Therefore, a failing cat can be incredibly dangerous for both you and your car.


Worn spark plugs are a widespread reason for the check engine light to come on. The spark plugs are responsible for igniting the fuel and air combination to start your engine. Older cars often experience this problem if they haven't changed their spark plugs yet. Over time, the spark plugs can get corroded, necessitating a replacement.


If your engine is overheating, for whatever reason, you may notice smoke emitting from under the hood and the temperature gauge rising. In some cases, it will trigger the yellow warning indicator.


Most people hope that this is the case for them when they see the frightening check engine light. The gas caps prevent gasoline from evaporating. If you've forgotten to close the lid all the way or there's a leak due to damage on the gas cap, it will activate the check engine light. If retightening it doesn't turn off the light, you may need to replace it altogether.


For check engine light diagnostics, we invite you to M&M Car Care Center Inc. If you notice any of the above signs, don't hesitate to reach out to our experts.