Check Engine Light: 7 Reasons Why It May Be On & What To Do As a driver, there is nothing more stressful than seeing the "check engine" light illuminate on your dashboard. Before you panic, it's important to know that the check engine light isn't always a sign of a major issue with your car. This light is part of the diagnostic system on your car; whenever the check engine light comes on, it's because the computer in your car has detected some kind of problem in the emission, ignition, fuel, or exhaust system of your vehicle. These issues can range from minor (such as a loose fuel cap) to much more serious (like a misfiring cylinder). Generally, a continuously illuminated or blinking check engine light means a fault has been detected, but the issue is often not an emergency. On the other hand, if your check engine light is flashing, the problem may need immediate attention. In this case, the best course of action may be to pull over to the side of the road and call for a tow truck. Regardless, the easiest way to find out why your check engine light is on is to run a diagnostic using a tool called OBD-II. This code reader (carried by any reputable mechanic or dealership) plugs directly into your car's computer to determine which fault code is causing the issue. So, what are the common reasons your check engine light may come on—and what should you do about the issue? 1) Engine Issues: The check engine light may come on due to a problem with the operation of your car's engine. This could include anything from faulty fuel injectors or spark plugs to a defective ignition coil. Ignoring serious engine issues can lead to more significant—and costly—damage to your vehicle. 2) Transmission Issues: Although your check engine light is related to the engine, it can also come on if there are problems with your car's transmission. When transmission problems occur, tailpipe emissions may increase, causing the light to illuminate. If you notice your transmission slipping gears, have your vehicle checked promptly. 3) Oxygen Sensors Failed: A failed oxygen sensor is a common cause of an illuminated check engine light. These sensors monitor exhaust oxygen levels and adjust air/fuel ratios for optimal performance. Failure of these sensors can impact your engine's performance and fuel economy. 4) Catalytic Converter Has Gone Bad: A malfunctioning catalytic converter can trigger your check engine light. The catalytic converter's role is to reduce emissions and protect the environment. If it fails, you may experience reduced fuel economy and engine performance. 5) Air or Fuel Delivery Problems: Issues with the mass airflow sensor can cause the check engine light to come on. These problems can affect airflow into the engine, leading to reduced fuel efficiency and potential damage to other parts of your vehicle. 6) Ignition System Problems: Ignition system issues can result in a misfiring engine, leading to a check engine light. Addressing these problems promptly is crucial to avoid further damage and repair costs. 7) Powertrain Control Problems: One faulty sensor or module in the powertrain can cause the check engine light to illuminate. While these issues are often quick and easy to repair, they may indicate underlying problems.
@HallPhoebes Stay calm when your check engine light comes on! It could be a minor issue. Get it checked with OBD-II for peace of mind. #CarCare #CheckEngineLight