What does it mean when the warning light stays on?

[VanKeira]

Here are the reasons why the warning light stays on: 1. The vehicle's exhaust emissions do not meet the standards, mainly due to excessive carbon buildup. Of course, a failed catalytic converter or clogged fuel injectors can also cause the engine warning light to stay on. The main causes of these warning lights are related to fuel quality and whether the gasoline is burning completely. To reduce the occurrence of these warning lights, it is important to maintain proper driving habits during normal driving, avoiding sudden braking or flooring the accelerator, among other improper driving behaviors. 2. The engine warning light may also stay on due to a malfunction in the internal components of the engine system. Car enthusiasts familiar with the internal structure of the engine know that the engine system is assembled with many sensors and various small components, which require regular maintenance during normal driving. Over time, these components and sensors are prone to malfunction. Therefore, if this situation occurs, it is recommended to visit a 4S shop for repairs. Methods like turning off the ignition and restarting the vehicle to resolve the warning light issue are not reliable and not practical.