If you own a vehicle, you’re probably well aware that virtually anything can go wrong. After all, vehicles have numerous moving parts, electrical components, and other elements. They all work together to keep your vehicle running properly or prevent it from doing so as the case may be. Some automotive issues are fairly obvious, such as extremely low air pressure in your tires or an air conditioner or heater that isn’t working properly. Others are a bit more ambiguous, though.
Unfortunately, many automotive problems fall into that latter category. Many vehicle owners may realize something isn’t working quite right, but they often don’t know exactly what’s wrong. That’s definitely the case when their check engine light comes. The sight of that small but ominous warning can induce panic, but it’s also a very general sign. All it really tells you is that something is wrong and you may need auto repair in Supply, NC. Thankfully, repair technicians can diagnose that cryptic message and give you a much clearer idea of what the problem might be. In the meantime, take a look at some of the common reasons a vehicle’s check engine light may come on.
A Loose or Damaged Gas Cap
In some cases, a loose or damaged gas cap is the culprit. It could be that you simply didn’t tighten the gas cap enough last time you filled the fuel tank. On the other hand, the seal around the gas cap may be worn or damaged. Either issue can alter the pressure in your fuel system and trigger your check engine light. In a situation like that, repairing the problem may be as simple as tightening or replacing the gas cap.
A Malfunctioning Oxygen Sensor
Another common reason for vehicles’ check engine lights coming on is a malfunctioning oxygen sensor. This sensor monitors the amount of unburned oxygen in a vehicle’s exhaust system. If it fails, it can detract from your vehicle’s fuel efficiency and cause it to produce more emissions than it should. You’ll need to have it replaced to resolve the problem.
Mass Airflow Sensor Problems
Mass airflow sensors monitor the amount of air entering vehicles’ engines and help to determine how much fuel to inject to keep the air-to-fuel-ratio just right. When they go bad, they don’t do their job properly. They can reduce a vehicle’s fuel efficiency and cause rough idling among other problems. Replacing them will correct the issue.
Faulty Spark Plugs and Ignition Coils
Faulty spark plugs and ignition coils can trigger check engine warnings as well. Spark plugs create the sparks that are essential for the internal combustion process. Ignition coils ramp up power from a vehicle’s battery to make the spark plugs work. If either of those components is faulty, it could make your engine spit or run rougher than usual.

Keeping Your Check Engine Light at Bay
When your vehicle’s check engine light comes on, it’s important to visit a mechanic as soon as possible to have the problem diagnosed. From there, you can have the issue resolved and keep your vehicle running smoothly and efficiently. Failing to heed that warning can lead to more extensive problems and more expensive repairs.