Five Reasons the Check Engine Light Seems Stuck On

The check engine light causes more stress for car owners than just about any other warning light. The concern is always that the problem is massive and expensive, but SpringMasters Auto Repair wants you to know that small issues can cause the light to turn on, too.

Failing ECM

The car’s computer, called the ECM or engine control module, is in charge of just about everything that goes on in the car. It’s the brains of the operation, and if those brains aren’t working properly, you might see quite a few odd warning lights. It’s also possible that the check engine light can get stuck on.

Broken Sensors

Several different sensors provide information to the ECM about how the car is running and how the engine is functioning. If those sensors aren’t working properly, the ECM won’t have all of the data that it needs to make adjustments. The chief sensors that could cause issues for you are the mass airflow sensor and the oxygen sensor.

Problems with Spark Plugs

The spark plugs are what gives the air and fuel mix the boom it needs in the engine. When spark plugs aren’t firing properly, either because they’re worn or the wiring is not functioning properly, that means that the engine starts to misfire. Misfiring is a big problem for your car’s engine, so the ECM alerts you to the problem by lighting up the check engine light.

Damaged Catalytic Converter

Your car’s catalytic converter is a key part of the exhaust system. It converts harmful engine fumes into less harmful ones, making the exhaust safer. If the catalytic converter starts to fail, becomes clogged, or worse gets stolen, that means it isn’t able to do its job. The car’s ECM will let you know that there’s a problem by showing you the check engine light.

Loose Gas Cap or Other Fuel Problem

Fuel issues are a big deal for your car’s engine because without fuel, there is no combustion. If the ECM senses that there are problems in the fuel system, it will show you the check engine light. That includes issues with the fuel pump or fuel injectors. But another common issue is that the gas cap might be loose. This can also flag the ECM to turn on the check engine light.

Whether the issue is big or small, we can figure it out for you at SpringMasters Auto Repair in Stickney, IL. Once we know exactly what is going on, we can get it fixed quickly and make sure you’re back on the road safely.

Photo by matsou from getty images via Canva Pro

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