We have all seen the check engine light illuminated in a vehicle at one time or another. While many people may think of this indicator as a nuisance, it’s essential to find out what’s going on with your vehicle; it may save you a hefty repair bill. In this article, we will look at some of the common causes of a check engine light.
Check the Gas Cap
One of the more common causes of the check engine light coming on is a gas cap that has not been tightened or has been damaged. The gas cap keeps vapors from escaping from the fuel tank, and when vapors escape, fuel economy and emissions suffer.
O2 Sensor
Another common cause of a check engine light is a faulty O2 sensor. Your vehicle’s O2 sensor ensures the proper air to fuel mixture is present. A defective sensor can trigger the check engine light to come on without any noticeable issues with the vehicle. So while you may be able to drive your car like usual, it’s not a good idea to ignore a faulty O2 sensor.
Spark Plugs
Another common issue that causes the check engine light to illuminate is worn-out spark plugs or spark plug wires. The spark plugs ignite the fuel-air mixture inside your vehicle’s engine. When the spark plugs are not working correctly, your car may run roughly, lack acceleration, and have poor fuel economy. In addition, malfunctioning spark plugs can cause other significant problems like damaging the car’s catalytic converter. Remember that spark plugs will eventually wear out and need to be changed as part of regular maintenance.
Catalytic Converter
Your vehicle’s catalytic converter is part of the emissions system that converts toxic gases into less-toxic gases. Cars and trucks sold in the United States have been required to have catalytic converters since 1975. A malfunctioning catalytic converter can cause several problems, including sluggish performance, excess exhaust smoke, and noxious odors.
Computer Diagnostic System
Your car’s onboard computer is equipped with a sophisticated diagnostic system that ensures your vehicle is problem-free. Unfortunately, this system can malfunction in some cases and indicate that a problem exists when it does not. There are several potential causes for the diagnostic system to malfunction, but a professional can help get this system back up and running.
Don’t ignore a check engine light, even if your vehicle seems to be running fine. There are several reasons that the light may come on, and some are more serious than others. However, it’s critical to keep this warning system in good working condition to alert you when a problem exists. Next time your check engine light is on, see a professional who can diagnose the problem and get you back on the road.
