The check engine light gives drivers a clear indication that something is wrong with their vehicle. However, there is more than one reason why it comes on. The problem may be easy to resolve, but most need to be dealt with by a mechanic. Knowing the causes below will help you to take the right steps when you see the light on your dashboard. 

Why Is the Check Engine Light On?

1. A Loose Gas Cap

This is one of the most common reasons the check engine light comes on and the simplest to fix. Your gas cap is an important piece of equipment that stops gas fumes from leaving the fuel tank and regulates pressure levels. The light comes on if it's loose. After you pull over, tighten the cap. 

2. Spark Plug Issues

These plugs deliver the spark that ignites the combination of air and fuel in the engine. When spark plugs or their wires become worn, the car won’t accelerate as quickly, and the engine will idle roughly or may not start at all. If you notice any of these issues, make an appointment with a mechanic to have the spark plugs changed.

3. Catalytic Converter Problems 

A car’s catalytic converter controls emissions by converting toxic gases into safe ones. Problems with this component are usually caused by issues with other parts of the car, such as faulty spark plugs or a malfunctioning oxygen sensor. Your car won’t pass an emissions test and its performance will be reduced unless these issues are resolved. 

4. An Engine Misfire 

If the light is blinking instead of staying on constantly, the most likely reason is a severe engine misfire. This is a serious problem because unburned fuel gets dumped into the exhaust system, which can damage the catalytic converter. Reduce your speed to lessen the load on the engine. Pull over as soon as it’s safe and seek professional assistance. 

If your check engine light is on, it’s time to take your car to a mechanic who can diagnose the problem. Puma's Auto Care in Brooklyn has reliably served car owners for over 15 years. This fully licensed and insured company offers everything from tune-ups and oil changes to brake service and transmission repairs. Call (718) 272-6306 to schedule an appointment, or visit their website to view a list of their services.