The check engine light is a common feature in modern cars that serves as a warning system for potential issues with the vehicle. When this warning light illuminates on the dashboard, it is an indication that there may be an issue with the vehicle’s engine or related systems. Understanding why the check engine light turns on can help car owners address potential problems and ensure the longevity of their vehicles.
There are several reasons why a car’s check engine light may turn on. One common cause is a malfunctioning sensor within the engine system. These sensors monitor various aspects of the vehicle, such as oxygen levels, fuel mixture, or temperature. If one of these sensors detects an abnormality or inconsistency, it will trigger the check engine light to alert the driver.
Another reason for the check engine light turning on could be related to issues with the vehicle’s emissions control system. This system is designed to reduce harmful pollutants emitted by the car into the environment. If there is a problem with any component within this system, such as a faulty catalytic converter or oxygen sensor, it can trigger the check engine light.
Additionally, mechanical issues within the engine itself can also cause the check engine light to illuminate. Problems like a misfiring cylinder or a loose gas cap can lead to irregular performance and trigger this warning indicator.
Top reasons a check engine light turns on
We sourced the video below to explain the top 5 reasons why a check engine light turns on.
Perform vehicle diagnostic with this wireless OBD2 scanner compatible with iPhone and Android devices.
What should you do when your check engine light turns on
You should not ignore your check engine light when it turns on, especially if the light is flashing and/or if your car is then shaking.
Reasons your car shakes with a check engine light on
There could a variety of reasons why your car shakes with a check engine light, including engine misfires. Don’t ignore your car shaking.
Perform vehicle diagnostic to identify trouble codes, including check engine codes.
David is an avid car enthusiast. Whether it is classic muscle cars or electric vehicles, David loves everything about cars. Over the years David has bought and sold many cars, as a consumer, and take an active interest in car repair. Outside of cars, David loves to regularly bike to stay active!