When you own a vehicle, you will want to make sure it operates efficiently. Part of this includes noticing if a dashboard warning light illuminates. When the check engine light comes on, it could be caused by various reasons.


Sometimes the reason for this light coming on may be an issue that is not related to the engine. If the gas cap is loose fitting or missing, vapors can escape from the fuel tank. When this happens, the check engine light may illuminate on your dashboard. It is usually the most common cause for the light turning on, especially if your vehicle is well maintained. It is also the cheapest fix for why a check engine light turns on. If the gas cap is on tight, but the light keeps coming on, it is best to bring your vehicle in so we can inspect the vehicle and fuel cap thoroughly.


Another reason for the light to come on is if the oxygen sensor has an issue. The oxygen sensor for your vehicle measures the amount of unburned oxygen in the exhaust. It also helps to measure the amount of fuel in the tank of your vehicle. This information is then transferred back to your vehicle’s computer system. If it is not working properly, the light can illuminate on the dashboard. The gas mileage can also begin to drop because your vehicle’s computer system is getting incorrect information for it.


The spark plugs are an important piece for your vehicle. The spark plugs ignite the fuel inside the engine. If the spark plugs are misfiring, the fuel mileage will drop in your vehicle. In some cases, you may even lose power to the engine. This can also have the potential to damage the catalytic converter. This is why it is important that anytime the check engine light comes on, you bring your vehicle in as soon as possible. That way the issue can be found and fixed before other parts of the vehicle become damaged.


If the check engine light comes on, the catalytic converter could be the issue. A catalytic converter is part of the exhaust system for your vehicle. It converts the harmful gases caused by engine combustion into less harmful emissions. Typically, catalytic converters do not fail unless related parts, like spark plugs, also fail. No matter what the issue might be, it is always beneficial to bring the vehicle in so we can inspect it for you.